FilterToSQL: try converting to Number before converting to String
CompareFilterImpl: Handle case where both values are strings that can be cast to numbers
FilterToSQL: try converting to Number before converting to String

CompareFilterImpl: Handle case where both values are strings that can be cast to numbers
Undo change to SLDStyleFactoryTest
Some additional tests for comparing numbers/strings
Fix Bridj unit test. The overridden setup methods needs to call super.
Add unit test for reading and writing GeoRSS. Includes bug fix for Bridjs support for String arrays and the removal of LayerCanCreateField check because the GeoRSS driver return false even though it needs to create fields when writing
Add unit test for reading the writing SQLite. Includes fix to sorting when using database based drivers that pass SQL straight through and thus dont have access to FID which is OGR SQL. Also adds LayerGetFIDColumnName to the OGR interface.
Add unit tests for writing and reading several formats: GeoJSON, CSV, GMT, GPX.  Updated GML and KML tests to make sure reading is working too.
Add environmental variables to the maven surefire plugin to make it easier to run unit tests
[GEOT-4656] AverageVisitor and MedianVisitor fail on null value
Exclude georss, gpx, sosi from the can create field check due to gdal bug
GEOS-6216: POST bbox query with complex attribute specified results in the wrong axis order
[GEOT-4674]: added a default switch case to ensure that all data types are supported, including shorts
Toning down logging level for axis order found in wkt definition
Merge pull request #350 from jdries/GEOT-4674

[GEOT-4674]: bugfix for netcdf support
Write gpkg_tile_matrix_set for tiles.
Clean-up commented code old spec
[GEOT-4675]: Min/max management for multiple PAMDatasets
[GEOT-4675]: min/max improvement on PAMDatasets (Added missing commit after rebasing)
Merge pull request #351 from NielsCharlier/geopkg2

Geopkg: Update to new specs with regards to gpkg_tile_matrix_set and clean-up