Blender Git Loki

- bf_assimp: blender now reads the list of supported file extensions directly from assimp.

- Remove unused code
- Set density to zero in obstacle cells

Fix for MinGW compiler

- Fix moving obstacles: Velocity near the border of moving obstacles was set to zero.
- Fix drawing of obstacles: Did not draw all obstacle cells

export of constraint targets to COLLADA

- Fix disabled obstacles
- Fix drawing of obstacles_from_derivedmesh

Problems: Obstacles are not airtight yet

- First implementation of alternative obstacle handling, removing the needs of particle-points
- Enable debug obstacle drawing

Texpaint tools
===============
* Highly experimental but useful feature. Random brush size during
stroke. This can be quite useful for texture authoring but it may cause
strange things to happen if not configured right. State and memory
allocations (which makes the tool experimental) often depend on brush
size so I made a function to get the non-randomized size too. I will
most likely change the naming so that BKE_brush_size returns the non-
Still no crashes here and a few very cool things can be done with this
brush setting :)

Rake brushes for texture paint
==============================
* port brushes correctly to projection painting
* put rake state to unified settings, it's probably the most accessible
place for texpaint/sculpt/display functions. Ideally I would put these
in the paint or brush structs but since these are actually screen-space
state they can be unique for each space and common to all brushes. This
is in preparation to unifying brush draw code.

forgot this brush rotation, remove debug printf

Remove remaining merge conflict marker and fix an error caused by renaming of a variable. Needs check by Phabtar!

add missing files from merge

merge with trunk r47866

export constraint to COLLADA edit.

Added X's for deleting vertex groups.

Added X's for deleting render layers.

Added X's for deleting keying sets.

Add smooth configuration along every axis X, Y, Z.

Add R key to change rotation type for texpaint brushes

Convirting GE to the new matrix stack manager.
Still, there is some clean up to do like remove glMatrixMode (because stack needs to be in correct matrix mode for old stack code)
Also, most gpuOrtho must be replaced with gpuLoadOrtho
This commit also contains GLES code for shaders, which later will be better integrated.