Alexander Dielen:

- updated the tutorial with further information on how to build the python bindings
- updated the cmake file so that cmake finds boost python installations with the names python2 and python3
- fixed a cmake warning on os x (Policy CMP0042: MACOSX_RPATH)
- fixed a bug in the unit test test_add_face.py

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@1237 fdac6126-5c0c-442c-9429-916003d36597

src/Python/Unittests/test_add_face.py

@@ -216,11 +216,12 @@ class AddFace(unittest.TestCase):
         self.mesh.add_face(self.vhandle[0], self.vhandle[5], self.vhandle[6])
         
         # non-manifold!
-        self.mesh.add_face(self.vhandle[3], self.vhandle[0], self.vhandle[4])
+        invalid_fh = self.mesh.add_face(self.vhandle[3], self.vhandle[0], self.vhandle[4])
 
         # Check setup
         self.assertEqual(self.mesh.n_vertices(), 7)
-        self.assertEqual(self.mesh.n_faces(), 4)
+        self.assertEqual(self.mesh.n_faces(), 3)
+        self.assertEqual(invalid_fh, openmesh.TriMesh.InvalidFaceHandle)
         
     def test_add_quad_to_polymesh(self):
         self.mesh = openmesh.PolyMesh()