python wrappers : support python 2.6 (fallback to pyCObject instead of PyCapsule)

git-svn-id: https://geuz.org/svn/gmsh/trunk@17376 59c8cabf-10d6-4a28-b43f-3936b85956c4


git-svn-id: https://geuz.org/svn/gmsh/trunk@17377 59c8cabf-10d6-4a28-b43f-3936b85956c4