FIX: VS 2013 does not support OMP 3.0

git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5247 42a5c34f-2066-0410-bec5-ba365beb4995
FIX: missing include

git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5248 42a5c34f-2066-0410-bec5-ba365beb4995
FIX: compiler warning

git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5249 42a5c34f-2066-0410-bec5-ba365beb4995
FIX: make things work on VS2013

git-svn-id: https://www.nitrc.org/svn/cmtk/trunk@5250 42a5c34f-2066-0410-bec5-ba365beb4995