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
[GEOT-4691]: NetCDF envelope fix (corner coordinates)
[GEOT-4691]: Fixed tests
simple composite curve type parsing support included, GEOT-4683, fixes #357
[GEOT-3949] SQL filters inconsistent with Java for null values
Merge pull request #336 from jericks/ogr_5

Add unit tests for writing and reading several OGR formats.  Fixes JIRA issue GEOT-4654
Merge pull request #335 from jericks/ogr_4

Add unit test for reading the writing SQLite. Fixes JIRA issue GEOT-4653
Merge pull request #334 from jericks/ogr_3

Add ogr GeoRSS unit test.  Fixes JIRA issue GEOT-4652.
Merge pull request #332 from jericks/ogr_1

GEOT-4650
Merge pull request #337 from jericks/ogr_6

Use environmental variables to make testing OGR module easier.  Fixes JIRA issue  GEOT-4655.