copy generated docs (if build) into help bundle
updated README and cleaned up ant build script
Merge pull request #175 from fgdrf/improve-doc-build

Copy generated docs (if build) into help bundle. Thanks for testing mpazos.
Merge pull request #176 from fgdrf/UDIG-2034


catalog.arcgrid bundle : renamed package to org.locationtech.udig

Change internal package structure from net.crishian.udig to org.locationtech.udig to reflect new project policy. Subsequent contributions will need to use eclipse package conventions rather than the authors name.