Blender Git Loki

Libmv: Fix compilation error with libmv disabled

First ping pong between low resolution buffers working. Nice landmark
for working code.

Also cleanup unused variables and do not bind the same texture to two slots
(blurred texture is going to be different anyway)

Framebuffer compositing:

* Cleanup compositing buffers better when not needed.

* Support passes for the dof effect through defines in main - easy
solution to allow not having too many files for one shader effect.

SSAO and DOF work well together now.

Merge branch 'master' into mesh-transfer-data

Code that enables simultaneous DOF-SSAO effect. There's some sort of
texture coordinate offset still.

Use optimized view space reconstruction for ortho case as well.

Add a library file for projection shader code, should enable us to use
optimized position calculation again - relevant for both SSAO and DOF

More attempts to synchronize viewport and camera dof - probably will
need fixes in the rendering systems. Reserve textures for the dof
effect.

Some misc UI enhancements...

Moved render simplification function for particle distribution into the
distribution code.

Removed unused variable.

A little bit of code sanity by splitting particle distribution function
by type.

Instead of squashing totally unrelated code into the same monster
function.

Moved particle code for distributions into own file to make hacking
easier.

This code is badly broken and needs to be replaced, but at least having
a workable code structure might help with quick hacks to fix the worst
cases.

Add vcol, rework BLI color blending to handle non-alpha colors, some fixes.

Add advanced mix modes to vcol (theorical only for now) and vgroups (working).

Also fixed stupid bug with vgroups when mdef CD layer already existed.

Fix: Poll for toolshelf UI buttons was spitting out warnings

Casting to bool is safer there

Code cleanup: Tidy up some stuff from previous commit

DOF calculation shader.

WIP