This addresses the 2D part of issue 168: the ability to specify which meteo parameter and time step to read/write from/to a 2D grid. This should be the prefered reading method in the future, since it leaves to the plugin the task of building the file name, extension, database table, etc This also provides added metadata and more control over the writing process.

First version of a PNG plugin. It only writes a grid for now, and nothing is user configurable. In the process, a small bug has been found in the RH spatial interpolation method (not handling nodata correctly)

A new method, getExtension() has been added to IOUtils in order to return the extension of a given filename. This is used by the SMETIO and SNIO plugins to automatically add the proper extension to input file names if they don't already have one.

The Median Average Deviation filter has been ported (and validated) to the new filtering infrastructure.

Several error messages have been improved.

Because POPC does not properly support std::cout and requires cout instead, this has been fixed in the code, with the necessary "using namespace" added. Only one std::cout remains (in IOUtils) and will be removed if absolutely necessary later.

Improved error message for the new copy mechanism. Currently, this has the following limitation: the parameter to copy must exist for ALL stations and be present for element 0 of each buffer.

Enhancement: It is now possible to duplicate a certain meteo parameter when reading data with MeteoIO. This feature is especially useful when one parameter needs to be filtered in two different ways (e.g. a running average spanning 5 hours and one spanning 48 hours). The syntax to use in your io.ini:

[Input]
COPY::TA2 = TA

This means that a new meteo parameter called TA2 will be added when reading meteo data from an IO source and that this new parameter will be initialized with the value of MeteoData::TA. Thus there is a copy of TA called TA2. This copy can be now used to set up a specific filter:

[Filters]
TA2::filter1 = mean_avg
TA2::arg1 = right 5 3600

Some Visual C++ warnings have been turned off (namely, that it can not generate a copy constructor) in MeteoIO.h, so each application using MeteoIO would benefit from it (and avoid being polluted by unecessary warnings). 

Exception catching is now done by const reference, as recommended in our coding style.

More size_t related issues have been found (thanks to the new snowpack server) and fixed. Basically, please remember that any variable used with/for the return value of a call to size() MUST be of type size_t (this becomes specially relevant in 64 bits).

The water triple point pressure has been updated to a better value.

A new library for dealing with SMET files has been developed. The plugin SMETIO builds on top of this library now. It provides:
- A SMETReader class, to read SMET files and parse the header info
- A SMETWriter class to write SMET files and set the header info

The SMET library (libsmet.h and libsmet.cc) are completely independent from the rest of MeteoIO. They have their own exception handling and helper functions, thus they can easily be distributed to other parties wishing to read and write SMET files with C/C++.

The POPC parallel object version of MeteoIO has been removed: now the library can be compiled with popc so that all marshalling code is present, but it does NOT create a parallel object of its own. This means that the caller is 100% responsible for deciding what should go into its own parallel object.

Some documentation has been updated as well as better error messages in smetio.

The CMakeLists have been reworked according to some comments from the cmake mailing list.

Fixing some unsigned int / size_t conversion issues by using more widely size_t (as it seems to be recommended and done in the STL)

The popc structure has been reverted to what it was before. The new structure, without any parallel objects was not working. 

The gcc flags used by the autotools have been adapted to follow more closely what cmake generates.

The POPC version has been heavily transformed. Since we would need IOManager has a popc object and this is quite hard (we need a backreference in Meteo2DInterpolator), all parclasses have been removed. Instead, the user will have the responsability to packaged IOManager in his own parclass if needed. This makes the code simpler and skips difficult issues...

A new fill method has been added to the Array2D and Array3D templates that does the reverse of subset (ie: reassemble arrays).

Better error messages have been put in SNIO.

A new Date setter that takes a Date object has been created.

This version does NOT correctly compile with the autotools (it leads to a segfault when running code using MeteoIO), but the cmake compiled library works fine.

A bug has been found in the processing of the variance: we were using a naive formula that is ill-fitted to signals showing small variations around a large mean. This lead to catastrophic cancellation and negative values... This has been replaced by a (slower) compensated formula (that works in two passes). The standard deviation filter has been fixed. 

The Tukey filter has been brought back into the new infrastructure and should now be usable. However it is not suitable to snow heights: in such a case, the standard deviation is too small (or even zero) and the signal might show some sudden variations (like in the case of a snow fall) that would therefore be falsely rejected. This filter seems much better suited to wind speeds that exhibit some constant background noise, thus a non-null standard deviation.

The rate filter can now take 2 arguments: in such a case, the first one is the minimum rate and the second the maximum rate. This would allow to define a descent rate different from the climb rate.

Several error messages have been improved in A3DIO and general plugin loading.

Finally, two small tools for working with smet files have been contributed, one allowing transparent loading of smet files in xmgrace (smet2agr). And the example io.ini has been fixed (it had been broken and was not working with the examples anymore)

A small bug has been fixed for code::blocks (dll_import should not be set for code::blocks on Windows). All #ifdef WIN32 have been replaced by #ifdef _WIN32 (which should be more standard). 

Version numbers have been pushed to 2.0.1 in order to prepare our upcoming release.

Next round of fixes for issue 68 (variable names starting with "_" under Visual C++). Hopefully, this issue should now be fully addressed.

The popc version has been updated. It is far from perfect (lots of popc specific hacks), it lacks an IOManager parclass, but this is the minimum that we need for Alpine3D...

The ptr_to_function to ptr_to_object cast warning has been turned off (at least for gcc). This does not fix the core issue (that has to be dealt with by the future c++ standard), but at least we don't see it anymore...

Another commit related to timezones... The Unix date always being in UTC, this has been fixed. The resampling was not using dates in a proper way, this has been fixed. The GSN plugin has also been fixed, it now rounds time to the closest minute (in order to be consistent with our advertised "1 minute time resolution"). A rounding method has been implemented for dates.

The timezone parameter in io.ini is now named TIME_ZONE instead of TZ for clarity. 

Undefined dates should now be fully handled (ie: also in arithmetic).

The (advanced) configuration of the BufferedIOHandler through io.ini (General section) has been added. It currently introduces two keywords (BUFF_CHUNKS_SIZE and BUFF_CHUNKS) to drive how much data to read at once and how much data to buffer. Currently, their product is directly used in the read, thus not reading anything by chunks smaller than a full buffer.

Fixed some << outputs, two compilation warnings found on Hera as well as introduced.

A new version of the CosmoXMLIO plugin is also part of this commit, with some necessary fixes in the CMakeLists

The definition of the "<<" operator has been written for IOManager and made more consistent for others

MeteoData now has an extra public member variable: StationData meta. It will hold the meta information of the measurment instead of dragging along a second vector<StationData> alongside the vector<MeteoData> everywhere.

This has huge implications: the IOInterface has been rewritten, subsequently changes need to be propagated into all plugins and all modules dealing with meta data.

The comparison operator of Coords has been reviewed and improved. The << operator that is not available for a parclass (for popc) can be replaced with IOHandler.toString() for POPC

Temporary fix for the << operator and POPC: a par class can not have a "friend" method... (so IOHandler can not redefine "<<" the way we used to do). Therefore, it has been disabled for popc

Several 1D statistical methods has been implemented while the existing ones have been made nodata safe.

Added a redefinition of the << operator for IOPlugin and IOHandler. This should be convenient for debugging!

Some small optimizations have been brought into the spatial interpolations following some tests with cachegrind. Nothing huge, but small improvements.

Several bugs have been fixed in Coords: the setEPSG was not working, the altitude was not displayed with the << operator and the formatting of decimal_to_dms was broken in its handling of seconds...

The documentation for the resampling has been expanded and several other modules' documentation have been updated so their structure is built along the same lines. 

An error message in IOHandler (when failing to load a plugin) was not clear and has been changed.

Several bugs in SMEIO have been fixed (improper column names mapping, improper handling of easting/northing, unclear error message).

The example data set has been tagged as GMT+1 and the meteo_reading and 2D_interpolations modified accordingly (so the argument read on the command line is assumed to be in GMT+1 too)

BUGFIX: When adding a key on the fly to the ConfigReader object it disappeared when accessing it in a plugin. Reason: The dynamic instantiation used the filename parameter in the constructor of the plugins instead of the ConfigReader object itself. Architectural change inside DynamicLibrary was necessary.

The documentation has been extended by adding a workflow diagram and more details for writing plugins.

The WSMDF format has been renamed into SMET. Therefore, the plugin has been renamed in SMETIO. Compilation and documentation have been updated accordingly.

Added new plugin for WSMDF format. gzipped version of format currently not supported. binary version works, but since the julian date does not fit into a 4 byte (32bit) float, it is unusable. ASCII format works, although unit_multiplier and unit_offset are currently not supported. For location information the easting, northing version is not yet supported.

Added function IOUtils::stripComments(string&) it, deletes everything after # or ; from the string&

Overall all include statements within in the library have been replaced by angle brackets, the default install path for the include file is $CMAKE_INSTALL_DIR/include/meteoio, the meteoio libraries (static and shared) will be installed in $CMAKE_INSTALL_DIR/lib per default.

The plugins will be installed in the subdirectory $CMAKE_INSTALL_DIR/lib/meteoio/plugins

A new plugin has been introduced: PGMIO that reads/writes PGM graphic files as 2D grids. (using the template plugin, it took less than 30 minutes for implementing the write2Dgrid!!)

More documentation has been updated/added, the template plugin has been fixed for some issues, the example io.ini shows more plugins usage.

The types TYPE_DOUBLE2D, TYPE_DOUBLE3D and TYPE_INT2D have been removed (and replaced by another, internal name because POPC does not accept templates and needs an alias for them). A variable that was used only within two private methods with a local scope in IOHandler has been removed from the class scope and is now a local variable.

The ARPSIO plugin's documentation is now correclty linked to the rest of the documentation. The reading of DEMs has been validated (with some bug fixes). It currently only works for APRSGRID modified data files (but supporting original ARPS ascii files should be easier). More explicit error messages have been added to Array2D

The first version of an ARPSIO plugin has been written, largely based on the code of LegacyIO. This plugin is mostly non-fonctional (besides reading DEM) because most of the concepts of ARPS files are foreign to MeteoIO... Finishing it will require carreful thinking and brilliant ideas! (the biggest issues have to do with the irregular grids that are a usual feature of ARPS files).

A warning has been silenced until we finish the implementation of the USER interpolation algorithm (reading user provided grids).

Then, the remaining namespace issues with doxygen have been fixed, by enclosing the full class implementation in the namespace (as seen for the libstdc++). This removes all these irritating issues. But the popc version has been broken by the change (as seen in LegacyIO).