#1898, #2322 move geos functions in lwtin.c to lwgeom_geos.c  to prevent unhealthy dependency on geos (for loader tools and also image generator), roll back change to cunit for loader (the geos includes). bump up version number to beta2dev

git-svn-id: http://svn.osgeo.org/postgis/trunk@11438 b70326c6-7e19-0410-871a-916f4a2858ee