Delted test function in rotate motion function.
Deleted the old simplex_set class.
The split face and split tetrahedron now use the split edge function.
Moved the orient_cc function to the ISMesh class.
Split orient_cc function into two functions, one that identifies the orientation and one that changes the orientation.
Clean up in orientation of faces.
Eliminated the invert_orientation function and orient_face function only orient interface and boundary faces.
Clean up in orient face helper functions.
Reimplemented the orientation functions (ensures consistent orientation of edges and nodes of a tetrahedron/face).
Renaming and clean up in orient functions.
Eliminated the old is mesh class completely (moved the kernels to the ISMesh class).
Added copyright notice to the new ISMesh files and renamed the is_mesh_API file to is_mesh.
Removed the get boundary/coboundary functions and a Simplex can only return a const reference to its boundary/coboundary.
Clean up in the remove functions.