shared ptr in occ

git-svn-id: http://svn.code.sf.net/p/netgen-mesher/code/netgen@809 38e36fca-e102-11dd-b6c5-65a6809f2f0c
fix warning

git-svn-id: http://svn.code.sf.net/p/netgen-mesher/code/netgen@810 38e36fca-e102-11dd-b6c5-65a6809f2f0c
including togl

git-svn-id: http://svn.code.sf.net/p/netgen-mesher/code/netgen@811 38e36fca-e102-11dd-b6c5-65a6809f2f0c