happign 0.3.0

• Refactor package to adapt to Géoplateforme

Breaking change :

• get_wms_raster(), get_wfs() and get_wmts() do not use apikey arg anymore.
• Order of arguments in get_layers_metadata() has been changed. The arg data_type now comes before apikey.
• get_iso() has be temporary removed from happign

Other change :

• Arg apikey isn't mandatory anymore in get_layers_metadata.
• Vignettes have been adapted to happign 0.3.0.
• get_wms_raster() now have a verbose argument
• get_wms_raster() function uses the WMS driver provided by GDAL to download a raster image. Instead of downloading and merging multiple tiles, it retrieves the entire image at once from the WMS server.