If degeneracy removal of face or tetrahedron fails, then the largest edge is split.
Added resizing of simplices (thickening of interface and thinning).
Clean up of move vertex function.
Crossing check is done before moving vertices.
Minor update in collapse.
Bugfix in move_vertex (returned false in the time step where a node was moved to its destination).
Allows collapses as long as the local tet quality does not come bellow MIN_TET_QUALITY.
Moved and renamed is_topological_removable to is_flippable (replaced the old is_flippable).
Removed unused border_flip function.
Updated the (currently unused) flip function to use the 4-4 flip function in ISMesh.
Added a print function which prints the neighbourhood of a node (for debugging).
is_topological_removable -> is_flippable.
Quit on completion is default.
Print information about the neighbourhood of a node if it was not possible to move it within 10 iterations (for debugging).