Added support for ExtededData (XDATA).

All the data described in http://www.autodesk.com/techpubs/autocad/acad2000/dxf/index.htm are parsed and the 1002 block goes to a list of attributes.
The SimpleFeature returns a Map with the parsed data and with a list with 1002 attributes
Create readme

Initial readme
Update formatting
changes to support hsqldb upgrade to 2.2.8
removing alias from script
bumping EPSG database version
bumping EPSG database version
update jdom version to 1.1.3
TEST/VERIFY - issue CCH-5: reformat NJ shapefile to meet new standard 
https://internal.cida.usgs.gov/jira/browse/CCH-5

Re-apply changes, with fix for System properties side effects, and
expected failure of testWriteReadBiggerNumbers
Re-introduce checks for data overflow, with fix for System properties
side effects, and expected failure of testWriteReadBiggerNumbers test.

Overflow check is disabled by default. It is enabled by setting system
property "org.geotools.shapefile.reportFieldSizeErrors" to TRUE.
Merge branch 'master' of https://github.com/rhayes-cida/geotools.git
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
GEOT-4554: Use PK by default when idExpression is missing.
GeoTIffIIOMetadataDecoder has been provided under MIT license
Correct MIT License
SOSNOKILLLICENSE was a misunderstanding of authors name
fix license summary
Correct header reference to JTS Envelope

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>
Restore original header from Dennis M. Sosnoski

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>
GeoTools has now joined OSGeo

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>
correct authors name

Signed-off-by: Jody Garnett <jody.garnett@gmail.com>

Conflicts:
	modules/unsupported/postgis-versioned/src/main/java/org/geotools/data/postgis/attributeio/Base64.java
GEOT-4567: String constants in idExpression causes error