Blender Git Loki

this fix resets the simulation on esc properly

added new rigidbody modifier doing the mesh island handling, instead of explode modifier

crash fix (wrong cache mapping) and white space cleanup (tabs only)

fixes for: moving the object during rigidbody sim (no crash anymore) and one piece was always stuck in the air (wrong calculation in cache)

some cache fixes to allow multiple (duplicated) rigidbodies with modifiers on them

added use rigidbody as new option, some smaller fixes

can run simulation backwards now too (update mesh from cache, but still sometimes crashes)

very basic collision works, but unreliably for now (sometime cache crashes, center of mass still wrong

sorta optical feedback (but massively wrong)

crash fixes, wip

attempts for integrating fractured objects into rigidbody sim, still wrong and incomplete

adapting rigidbody sim to accept mesh shards too (in progress)

small build and link fixes

update and merge code branches - voronoi modifier

test commit

Merge branch 'master' into soc-2013-sketch_mesh

Merge branch 'master' into soc-2013-rigid_body_sim

Conflicts:
intern/rigidbody/CMakeLists.txt
release/datafiles/splash.png
source/blender/editors/space_view3d/drawobject.c
source/blender/makesdna/DNA_view3d_types.h

I adjusted some variables names.
The modifier sends a message on screen if the system not found a solution: (The Modifier not determines if a system is soluble, the numeric solver OpenNL Superlu notifies if solution was found.)
Fix bugs:
- Load file in a correct way.
- Delete vertex co (float array) when the bind flag is false.

Code Cleanup: minor changes to laplacian deform modifier interface

Code Cleanup: style edits and avoid sqrt