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
[GEOT-4656] AverageVisitor and MedianVisitor fail on null value
[GEOT-4694] Have xsd-sld validate and parse geometry transformations in SE 1.1
Merge pull request #338 from sgraca/GEOT-4656

[GEOT-4656] AverageVisitor and MedianVisitor fail on null value
GEOT-4695 Image Reader should return null if no image data is available
GEOT-4696 Image mosiac jdbc cannot handle single band float images
GEOT-4525 JDBCAccessPGRaster - updating mosaic extent/resolutions table
GEOT-4619: Support MapInfo TAB files in geotiff format reader
Updated links for spatialite libs to new build server
GEOT-4697: fixed some encoding issues for FES filters
Fixes for footprint management with 'border' inset behavior
Merge pull request #321 from NielsCharlier/mapinfotiff

GEOT-4619: Support MapInfo TAB files in geotiff format reader
Using renamed spatialite/sqlite jdbc driver
Merge pull request #360 from mbarto/geot4697_filter_20_encoding_issues

GEOT-4697: fixed some encoding issues for FES filters
[GEOT-4698] LiteralExpressionImpl.equals return true even if the two values are not equal (point in case, two different dates)
Some mosaic footprint management performance optimizations
Merge pull request #362 from jdeolive/spatialite-jdbc

Using renamed spatialite/sqlite jdbc driver