Blender Git Loki

Remove 'topochange' from EDBM.

In future, there may be several tools relying on topo hash, each one making
updates to it when it needs. Hence, such thing should absolutely not be held
by mesh data, but (in this case) by Key data.

Also made some reorganization and renaming a bit.

Note: this code compiles, but for now cannot really be tested, since scratch
is not enabled...

Merge branch 'master' into soc-2014-shapekey

Merge branch 'master' into soc-2014-shapekey

Add Mesh's counterpart to BM_mesh_topology_hash.

Fix stupid logic error.

Use new BLI_hash_mm2a.

Merge branch 'master' into soc-2014-shapekey

Reorganization and better topohash code (2 times faster at least).

WIP, will move murmur2a to BLI in master first.

Merge branch 'master' into soc-2014-shapekey

Merge branch 'master' into soc-2014-shapekey

Conflicts:
source/blender/editors/mesh/editmesh_utils.c

Merge branch 'master' into soc-2014-shapekey

Merge branch 'master' into soc-2014-shapekey

Conflicts:
source/blender/windowmanager/intern/wm_operators.c

Tweaks to skey compression: switch from userpref option to savefile op option.

Makes more sense, and follow what we did e.g. for BMesh.

Fix for previous merge.

Merge branch 'master' into soc-2014-shapekey

Cleanup some leftover changes from merge of 'move skey' part in master.

Merge branch 'master' into soc-2014-shapekey

Merge branch 'master' into soc-2014-shapekey

Merge branch 'master' into soc-2014-shapekey

Conflicts:
source/blender/blenkernel/BKE_key.h
source/blender/blenkernel/intern/key.c

Better icons (use one tri + bar to symbolyze 'ultimate' left/right/up/down).

More universal and sensible (double tri usually means 'quicker' rather than 'farther').