For building with Visual C++, added new flag DEBUG=1 (see GEOS building instructions on GEOS Wiki). Added missing flags for Visual C++ compiler, in release and debug configuration.
For building with Visual C++, added new flag DEBUG=1 (see GEOS building instructions on GEOS Wiki). Added missing flags for Visual C++ compiler, in release and debug configuration.

git-svn-id: 6c2b1bd10c324c49ea9d9e6e31006a80e70507cb@2130 5242fede-7e19-0410-aef8-94bd7d2200fb

Uli1/geos,vmx/geos,vmx/geos,Uli1/geos,vmx/geos,Uli1/geos,vmx/geos,vmx/geos,Uli1/geos,Uli1/geos,Uli1/geos,vmx/geos,Uli1/geos