Improved an error message, improved the main documentation page by adding links to the home page, improved the code examples

The plugins are no longer separately loadable libraries, but are fully incorporated into libmeteoio. All classes and facilities that provided capabilites for the dynamic loading were deleted (DynamicLibrary). IOPlugin now holds a function pointer to an instantiation function for children of IOInterface. In IOHandler::registerPlugins() all plugins need to be registered with the key name, the class name, a pointer to an instance of the class and a function pointer to the instantiation function for the class (child of IOInterface). IOInterface lost some complexity and thus the constructor of the base class does not have to be called in derived classes anymore.

The CMakeLists.txt files had to be updated to no longer make separate dynamically loadable libraries for each plugin, but to simply add the classes the user selectes to the meteoio library. 

As a side effect the io.ini key GENERAL::PLUGINPATH is no longer necessary.

A wrong commit on doc/examples/io.ini has been reverted. A new undercatch filter has been implemented, following (Hamon, 1973). I would not recommend using it for the moment, though. 

The issue 222 was actually more complex than it seemed: the behavior of an uncaught exception is actually not specified by the standard, so there is nothing that could be doneon MeteoIO's side: instead, each application is invited to properly wrap its calls in try/catch blocks, or wrap its whole main in try/catch. The code examples and examples have been modified to show several such possibilities.

New methods "moveByXY" and "moveByBearing" have been added to Coords, addressing issue 39. Code cleanup and extensive documenting have been performed on Graphics and PNGIO, that now supports creating world file (optionnally). A new option has also been added to ARCIO, "A3D_view", to generate file names compatible with the Alpine3D's grid viewer (false by default). A new function to remove the extension from a file name has been implemented in IOUtils.

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.

Fixed a few compilation warnings found on Illusion. The buffer centering has been introduced in BufferedIOHandler: the user can specify centering as a fraction of the buffer size or as a duration before the requested date (when rebuffering). The documentation has been updated accordingly.

Debugging output cleanup in CosmoXML.

The WIND_AVG filter has been ported. The problem is that it is not possible to get at the same time VW and DW. This will have to be fixed later... 

More documentation has been written. 

Documentation update. A new section "how to build your io.ini configuration file" has been added to the end user section of the documentation.

The min and max filters have been implemented. The "how to write a filter" documentation page has been updated to relfect the latest changes. The operator << has been implemented for various objects involved in the data processing.

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

A new group of classes has been created, under the meteolaws subdirectory. This contains various general meteorological laws, such as a sun radiation model, standard atmosphere, etc

The first implementation (not tested yet) of a non-linear least square fit algorithm has been implemented in the libfit1D. 

Several documentation issues have been fixed (obsolete code examples, etc) and classes grouped by modules. This should help the user to quickly locate the classes of interest. 

The documentation and examples have been updated to reflect the latest changes in MeteoIO (namely: the merging of MeteoData with StationData). A documentation bug has been fixed, that involved deleting the doxygen comments for the commented "clone()" method in IOInterface. Since this is not used anywhere and has been commented out for a while, this method has been fully deleted.

Meteo2DInterpolator now has its own << operator for debugging purposes.

First (non working) implementation of the ordinary kriging. The variogram fit still has to be done... But a few const issues have been fixed in Matrix and a new method added (to read a 1x1 matrix as a scalar).

Fixed some doxygen warnings, added a howto for writing spatial interpolations.

Better Oracle OCCI detection, renammed into FindOCCI.cmake and used by the ImisIO plugin compilation.

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

A class diagram has been added to the documentation as well as more detailed instructions in the "how to write a plugin" section (with links to the template plugin and CMakeLists compilation files)

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

Some uncommitted fixes to the documentation are now committed. Hopefully all the namespace issues (ie: broken links) are now fixed!

Changed the name of the Date_IO class to Date. In case of namespace conflicts, just use mio::Date to reference the MeteoIO Date class.

New documentation has been added about the coordinate systems support. This is now easily visible to the end user.

A few typos have been fixed in the documentation, the welcome page has been restructured and a naming conflict (GRID_POINT for both 2D and 3D grids) has been temporarily avoided by calling these structures GRID_POINT_2/3D. This still leaves the question of how to handle DEMObject with 3D grid open though...

The long wave radiation parameter is now ILWR instead of LWR (since some might have net long wave and this is also closer to short wave (with ISWR)).

The physical filter algorithms (as defined in libinterpol2D) have seen their interface modified so they all follow the same logic (for the order and naming of the arguments).

The documentation has been cleaned up (the warnings have been fixed, some missing items added).

The new Coords object is now used by all grids (Grid2DObject, Grid3DObject, DEMObject) as well as by all plugins (but checking proper operation was not possible for GSNIO because of missing libraries on my system...). The documentation has been updated as well as the code examples. A few extra methods have been added when usage has shown the need/convenience of having them (specially for standardazing some processing called by the plugins). A few small bugs have been fixed (possibility of not updating or improperly updating the coordinates in some rare cases).

The proper marshalling for Grid3DObject has been implemented (it was more or less a dummy method until now). One bug has been fixed for Proj4 support. The code of most of the plugins has been cleaned up in order to get rid of the few remaining "using namespace" in header files. 

The class Stationdata now properly uses the new Coords class. All usual dependencies have been fixed (A3DIO.cc) but not (yet) the optional plugins. The Coords class has been modified so that it computes the matching coordinates as soon as possible instead of the previous implementation that was delaying it as much as possible (thus making "const Coords..." impossible).

The includes have been cleaned up (compilation was failing because of multiple "using namespace" in header files) and all "using namespace" have been removed from header files (please don't put any of these back!!). The doxygen comments has been updated.

The MapProj class has been renamed in Coords. It now contains the coordinates (lat,long) and (xcoord, ycoord) and should therefore be used as a storage and conversion class. The necessary changes have been made to the rest of the code so it uses this class, but it still does NOT use it as a storage of coordinates (which will have to be done in the future). This addressed partially issue 35.

The license information has been added: LPGLv3 headers in all header files, license texts as well as a Linux Software Map entry file.

The installation procedure has been added to cmake configuration files (similar to the autotools)

More doxygen documentation has been written (Thomas, you're invited to contribute!!)

Oups... I forgot to add the MainPage.h file that contains the main documentation page (and no active code)