meshes in 1D, visualization

git-svn-id: https://netgen-mesher.svn.sourceforge.net/svnroot/netgen-mesher/netgen@667 38e36fca-e102-11dd-b6c5-65a6809f2f0c
openmp-flags in LDFLAGS

git-svn-id: https://netgen-mesher.svn.sourceforge.net/svnroot/netgen-mesher/netgen@668 38e36fca-e102-11dd-b6c5-65a6809f2f0c
fixes by Jacques Lechelle for P2 elements

git-svn-id: svn+ssh://svn.code.sf.net/p/netgen-mesher/code//netgen@669 38e36fca-e102-11dd-b6c5-65a6809f2f0c
non-transparent clipping plane

git-svn-id: svn+ssh://svn.code.sf.net/p/netgen-mesher/code//netgen@670 38e36fca-e102-11dd-b6c5-65a6809f2f0c
Merge remote-tracking branch 'remotes/trunk'