Changed CMake config file such that OpenMesh can be built stand-alone as well as external library to OpenFlipper in the libs folder.
Changed CMake config file such that OpenMesh can be built stand-alone as well as external library to OpenFlipper in the libs folder.

git-svn-id: e0b5bbb11d0e9fdbbfcabba14dc32ad5d6b235bd@503 fdac6126-5c0c-442c-9429-916003d36597

svn2github/OpenMesh2,svn2github/OpenMesh4,svn2github/OpenMesh2,svn2github/OpenMesh4,svn2github/OpenMesh2,svn2github/OpenMesh4,svn2github/OpenMesh2,svn2github/OpenMesh4,svn2github/OpenMesh2,svn2github/OpenMesh4