More documentation about ECMWF and MeteoCH as well as a new name that is tried when looking for a DEM grid: "height"

Fixed an initialization bug that always tried to setup downscaling... Slightly better documentation about exploring the parameters of a NetCDF file.

More documentation improvements... Now it should be quite straightforward to build downscaled time series for virtual stations based on Era Interim.

Added a documentation section about Era Interim. In the ECMWF schema, the "Albedo" parameter has been replaced by the "Forecast albedo" parameter has it simplifies data retrieval.

A bug has been fixed in the NetCDF plugin that prevented reading some DEMs. The ability to remap parameters (between NetCDF and MeteoGrids) in the ini file has been added in order to add flexibility. The support for "years" and "months" time units has been implemented in a way that is compatible with the standard NetCDF tools.

The NetCDFIO plugin can now properly handle multiple files in one directory specified by "GRID2DPATH" or one single file specified by "GRID2DFILE". Small code cleanup in CNRMIO and CosmoXMLIO.

A new MeteoGrid has been created, RSNO to contain the snow mean density. This is used in NetCDF in order to handle more fields and therefore extract the snow height from ECMWF data sets.

This is the first implementation of a downscaling method: when declaring "downscaling" and providing virtual stations, grids are read and the virtual stations populated with values out of the grids.

This is the first implementation of the algorithms described in Tilg, A.-M., Marty C. and G. Klein, 2015: An automatic algorithm for validating snow depth measurements of IMIS stations. Swiss Geoscience Meeting 2015

The ALS_SCALING spatial interpolation has been improved: it is now possible to only redistribute the precipitation where the local air temperature is below a given threshold. This has lead to better results.

The timezones are now propagated into Sun and SunTrajectory so the sunrise, sunset, solarnoon, can be shown in the local timezone. Two new methods have been implemented: getSolarTimeOfDay() and getSplittingBoland() that returns the splitting coefficient according to (Boland et al., 201).

Documentation fix in InterpolationAlgorithms.

Allowing the "soft" keyword to be upper/lower case and anywhere in the argument list for filters. Changing the rating of the AVG_LAPSE to be the exact same as IDW_LAPSE when only two stations are available, so the input order give precedence in this case (more logical).

Better handling of the units parsing in IOUtils, fixed documentation glitches in FilterMAD and much improved error reporting in spatial interpolations

The CST spatial distribution algorithm has been split in two: CST that fills the grid with a truly constant value (as given in argument) and AVG that fills the grid with the average of the measurements. Similarly, there is now an AVG_LAPSE method.

The gridsmanager and timeseriesmanager can now provide a copy of their Config object. This has been used to fix a bug in the USER and ALS_SCALING spatial interpolation methods that were not properly reading their input files from GRID2DPATH. Moreover, now ALS_SCALING switches to CST when only 1 station provides measurements.

A new spatial interpolation method has been implemented: it takes an ALS and rescales the grid according to it. So far, it is quite primitive, more developments are expected!

The version string was delimited by " that had to be escaped for cmake. This escaping made Xcode refuse to read cmake generated project files. Removing the " and their escaping now works properly on osx, windows and linux.

Several exceptions have been renamed in order to be more generic (ex: instead of FileNotFound -> NotFound) and their text has been modified accordingly. The GSN plugin now reports the errors with more relevant details (invalid sensor name, no permissions).

Fixed a small bug in the MERGE feature and small improvements to the GSN plugin (always set a station ID, up to date documentation, more possibilities in the parameters names matching). Otherwise, minor code cleanup.

Small documentation update and relying on views for two more queries to the database (only one query remains that does not rely on views).

A few extra comments have been added to better understand the flow of data. The "merge" feature was not properly handling all situations, this should now be fixed.

The EXCLUDE/KEEP/MERGE keys (as well as the associated stationIDs) were case sensitive and this was making trouble. This is now case-insensitive. A warning flag has been changed for Clang to prevent reporting fake warnings (the flag does not make sense at all and only exists for compatibility reasons).

The MERGE feature has been much improved: the syntax now follows the (more logical) EXCLUDE/KEEP syntax: 
*WFJ::MERGE = WFJ2 WFJ1
The documentation and debug toString() have been updated.

A new "raw data editing" method has been implemented: merge_by_name. Stations sharing a common name can be merged together with the MERGE_BY_NAME key in the [Input] section. The documentation has been edited to bring visibility to the "raw data editing" features.

Micro optimizations for Sun.cc, converted an exception into a warning in ImisIO and fixing case in message in Smetio

Swapping the order of the tests hoping this could solve the issue of the "SMET plugin not found" when testing Snowpack (ie maybe the coverage compile breaks some of the plugins)