Blender Git Loki

Cloth: hacky way of adding newly created vertices

This has been done just for testing purposes, to see if new vertices can be added one by one. It works, now to resolve all the crashes.
Newly added vertices seem to remove the old vertices, so next splitting of edges leads to crash.
Newly added vert and corresponding edges, seem to have rest lengths of 0 leading to the entire cloth collapsing.