Blender Git Loki

added vertex group support to mark passive areas of an object (which remain static)
also rudimentary ground toggle / ground connect toggle operators

compile fixes after merge

Merge remote-tracking branch 'refs/remotes/origin/master' into fracture_modifier_oldsim

Conflicts:
source/blender/blenkernel/intern/DerivedMesh.c
source/blender/blenkernel/intern/rigidbody.c
source/blender/blenkernel/intern/smoke.c
source/blender/editors/space_buttons/buttons_context.c

just crash prevention, but mesh can still be messed up when attempting to move mesh out of fracture point location, especially with greasepencil

bah, other pointsources than uniform tend to crash, this is a fix attempt for greasepencil (but generally, dont try to move the object after fracturing with greasepencil by hand....

small gui fix in regular rigidbody constraints panel

well, a crash "prevention" with autosmooth, but it doesnt work anymore with the fracture modifier this way.

added threshold vertexgroup support (a single vertexgroup with weightpainting)

reactivated modifier editmode "support" (but well, it doesnt really work...) and removed fracture edit mode (didnt work at all)

added fracture preset storage and fix for loading files -> mesh was doubled there

re-added contact distance and mass dep. thresholds, also fixed a python gui error -> override solver iterations in scene

fix for automatical recreation of constraints after loading

fix for not updating fractured mesh with constraints enabled

fix attempt for messed up bake data after linking objects

copy rigidbody world when linking objects to scenes (if it exists)

can copy rb bakedata now with scene

crash fix for loading data with halving applied only (and no fracture)

progress bar display fix attempt, still glitchy...

partial fix for progress display (can still exceed progressbar) and fix of a memoryleak when halving only

copied derivedmesh was not freed after usage