* Added capability of writing gz compressed STL surface meshes
* Added capability of writing gz compressed OpenFOAM meshes


git-svn-id: https://netgen-mesher.svn.sourceforge.net/svnroot/netgen-mesher/netgen@666 38e36fca-e102-11dd-b6c5-65a6809f2f0c
Merge remote-tracking branch 'remotes/trunk'