Blender Git Loki

Stubs for new facemap widget, fixes for facemaps.

Move/remove facemap not working well (probably was never working but by
displaying them has actually made the issue apparent)

Fix crash with decimate modifier on zero.

Fixes to facemaps:

* Test display code that displays the active facemap. Will not work on
subsurf modifier yet (crash)
* Fix loading of files with facemaps
* Facemap data now reside on polys instead of tessfaces.

Merge branch 'master' into wiggly-widgets

Fix stupid merge error.

Merge branch 'master' into asset-experiments

Conflicts:
source/blender/blenloader/intern/writefile.c

Reverting back to add_relation(), while still directly using the operations

Silence compiler warnings

Convenience API's and debugging funcs for all "keys" used when building the graph

Code cleanup: Remove excess debugging code no longer needed

Bugfix: add_relation() now works again

This was broken by an earlier attempt to grab debugging info for nodes,
which ended up preventing the templates from matching correctly

WIP: Refining debug code to figure out if operations lookup is really working correctly

Code cleanup: Remove some of the old commented out versions of these calls

Move all object transform node building code into a single function

Code cleanup

Adding some protection to add_operation_relation() to avoid crashing when an invalid node is encountered

WIP: Now constraints also directly specify the operations they use when creating the relationships directly

WIP: Hacky attempt to get proper links working again, but directly linking up the necessary nodes

This code needs a lot of cleanup, but the generated graphs are now looking
more like what was originally intended

WIP: Added in a (commented out) position for verify_entry_exit_ops()

The commented out version does away with the superfluous auto-generated noops,
which get added because we can't tell if any node is an entry/exit at the
time of doing that

Added more debugging prints to figure out where the lookups are failing