Blender Git Loki

WIP: Functions to find useful information about the local neighborhood when applying displacements to a face.

WIP: Added a function to select a vertex in a subdivided face using x/y coordinates.

Starting to merge some work related to fixing tangent calculation.

* Removed some unused static functions
* Added a vert_edge map to complement the ones for faces

For moving through displacements, use a 2D coord system based on vertex side total, not disp side total.

Preparing for a change in the way the TS matrix is calculated. Removed the old fixed matrix entirely.

A few very minor sourcecode cleanups, moved "old" multires code to bottom, removed unused _setLevel function.

Fix for reshape, works outside of sculptmode now.

The displacer struct is now only used in multires, moved out of the header file and cleaned up.

Little performance fix; was recalculating some data unneccesarily

Initial implementations of the interp and swap customdata functions for MDisps.

Added a Del Higher button to multires, removes levels higher than the currently selected one.

Before saving a file, make sure sculpts to multires are stored in MDisps

For file loading and mesh joining, allow single-step subdivision (same result, just faster)

Merge with r16081

Removed *yet more!* old crufty multires stuff. I think this is all of it now.

Added back the choice between simple subdiv vs. catmull clark for multires.

Removed huge tons of old multires stuff.

Removed a bunch of references to the old multires.

Note: python needs updating to work with the new multires. For now, I've just been commenting out the python multires stuff with #warnings

Better performance for loading old multires files by blocking multires updates during subdivision.

For loading old files: no need to generate maps for the last level.