Hardware culling support for meshes

[lrabius]

Meshes now support hardware culling for all display types and wireframe. It can be set to none, clockwise or anticlockwise.

Also hide/show meshes loaded from file is fixed.

[JustusBraun]

When selecting a MeshGoal the culling mode is not applied in the intersection query in IntersectionHelper.cpp.

mesh_tools/rviz_mesh_tools_plugins/src/InteractionHelper.cpp

Lines 108 to 111 in 8bfd749

	std::pair<bool, Ogre::Real> goal = Ogre::Math::intersects(ray,
	vertices[indices[face_id * 3 + 0]],
	vertices[indices[face_id * 3 + 1]],
	vertices[indices[face_id * 3 + 2]], true, true);

If there is a way to query the CullingMode from the input ManualObject this would be a nice addition :)