Blender Git Loki

Import v2012.07 of OGDF into extern libs

As a quick test, this imports OGDF into the source tree (later it could be removed
and added as a prebuilt static lib instead). The intention here is to use it for
drawing the debug graphs for the depsgraph.

Only scons is supported right now.

Depsgraph: Compile fix for pchanmap

Depsgraph: Tweaks to make graphviz-neato debug graphs more legible

Dot will crash when graphs are generated using this option, but for neato graphs,
at least we can see what the different items are this way.

Cycles fixes

DerivedMesh updates

Hacky fix for saving texpaint ptex changes

Add UI for changing Ptex resolution

Add operator to resize Ptex data

WIP, trying out separate types for some of the ptex data

Too much padding right now, but we'll see

Temporarily turn off shader preview rendering

WIP ptex node in cycles

Temporary hack to ensure packed image pointer

Add RNA access to ptex_coords

Allow ptex node to be a texpaint slot

Texpaint beginning

Add Ptex layers to mesh-data UI

Update Blend file saving/loading for Ptex

Add operators to add/remove Ptex layer

Copy pasting :(

Add Ptex shader node

WIP Subsurf modifier updates