Blender Git Loki

* Fixed SCULPT_dynamic_topology_sync_layers to properly sync
active/render/clone/mask layers indices.
* Fixed sculpt color bugs in pbvh drawing for bmesh.

Fix nasty crash in dyntopo with non-manifold geometry.

* Fixed vcol drawing in indexed smooth shading mode

Added detail_size to local dyntopo brush settings

SCULPT_calc_principle_curvatures now has option to use
slower but more accurate BLI_eigen_solve_selfadjoint_m3 solver.

Merge branch 'master' into temp_bmesh_multires

commit prior to merge

Last attempt at fixing boundary brush for now. Unassigned boundary
verts now get bend data from their neighbors. Still isn't quite
satisfactory but better then before.

* Fix crash in boundary sculpt tool
* For some reason boundary tool sometimes fails to match verts to
boundary verts. It now simply freezes them in place if that happens

Commit current code state

Fix another crash

Fix infinite loop bug

Fix extremely nastly memory corruption bug in pbvh

* Fix bug in last commit, broke draw brush

Fix dyntopo undo bug

fix last commit

Fix crash

Get rid of various __attribute__((optnone)) I had scattered throughout
the code

* Dyntopo cleanup mode is now on by default.
* Fixed undo bug

* Merge branch 'master' into temp_bmesh_multires
* Implemented DynTopo option to dissolve 3 and 4-valence
vertices.
* Fixed bug in dyntopo collapse customdata snapping.