Blender Git Loki

UI: don't show tips when navigating ui-list

Cleanup: use const for units API

Also make return args explicit.

Math Lib: inline project_plane_v3_v3v3

Missed setting handles in curve dissolve

Correct header (can't use uint here)

Fix bl_load_py_modules test

- scripts that execute directly need to include their basedir in the sys.path
- modules which are in a directory without an __init__.py weren't importing.

Merge branch 'temp_remove_pointcache' into blender2.8

Merge branch 'temp_remove_particles' into blender2.8

Curve: new dissolve tool

removes vertices, re-fitting the surrounding handles.

Curve Fitting: expose function for fitting a single curve

BLI_array_utils: helper for stepping over contiguous ranges

Fix compilation error on Armel architecture

__GCC_HAVE_SYNC_COMPARE_AND_SWAP_n are not defined on this architecture
for some reason, however those functions are available.

Adding a workaround for newly used __sync_fetch_and_and() function.

Fix T48325: Data transfer modifier vertex group selector doesn't work with freestyle data.

Freestyle edge/face marks are (afaik) our only actual customdata bitflags... Original work
kinda assumed we had no such things. :P

Fix Cycles external OSL shader not working with relative file paths.

Fix T48118: Vertex Groups not masking particle hair emission correctly

Own regression from rB019ce363b01bba0af, not totally sure why removing the heading
zero value in element_sum broke binary search distribution in random branch, but...

New code makes thing sooo much simpler, by simply getting rid of all zero-weight
items in element_sum (at the cost of adding a temporary extra index mapping array),
that way neither random nor 'even ordered' distribution code has to wory anymore
about skipping zero-weighted items!

Removed DNA for point caches.

Slight adjustment to curve fitting tangents

Don't let the point spacing give bias to a side.

Fix for typo comparing double events

Also remove doubles when filling the final array.

Cleanup: warnings. spelling

Fix (unreported) bad 'NULL freeing' with placeholder images.

Looks like code expects some initialized Image data after all, so do it
for placeholders as well (using default generated UV grid).