epsg_tr.py: change to make it possible to export GEOCCS and COMPD_CS to proj.4 epsg and PostGIS spatial_ref_sys.sql files

git-svn-id: https://svn.osgeo.org/gdal/trunk@27304 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_with_coverage