Blender Git Loki

Update Blend file saving/loading for Ptex

Add operators to add/remove Ptex layer

Copy pasting :(

Add Ptex shader node

WIP Subsurf modifier updates

WIP cycles packed texture stuff

WIP tex image node

WIP GPU stuff

WIP add ptex vertex attrib to DerivedMesh for GPU drawing

WIP imbuf hacks

WIP Ptex texture packing

Really stupid but working texture test

WIP add Ptex UVs to Cycles mesh

Temporary customdata mask tweak

Tesselation for Ptex loop layer

RNA updates for Ptex

Move Cycles' Ptex attribute from vertices to corners

Add some Ptex code to BKE

Add a couple new CustomData layers for Ptex

Add some Ptex types to Mesh SDNA

Silence warning in Ptex