Blender Git Loki

Isomap Unwrapper
=================
* First part of optimizations found in paper:

"Texture Mapping using Surface Flattening via Multi-Dimensional Scaling"
by Gil Zigelman, Ron Kimmel and Nahum Kiryati

(Multi-Dimensional Scaling is actually isomap with another name).

Implemented Dijkstra graph search algorithm that drops distance build
times from n^4 to n*(n*logn). The paper also describes a better distance
calulation algorithm so it seems like we shall soon see ISOMAP in its
full glory after all ;)