Blender Git Loki

Remove SparseTile; support CPU tricubic interp.

Sparse grids now use their normal types instead of a specific struct.
Also added support for tricubic interpolation of sparse grids for CPU
rendering.

Minor comment on possible TODO while validating paint ops for CoW...

Alembic export: CoW/Depsgraph fixes

Alembic export: port DerivedMesh ? Mesh

Alembic import: port DerivedMesh ? Mesh

Cleanup: Fix comment

Bone selection: user control contrast

Experiment: let the user be in control of the alpha channel as some rigs
are hard too see during bone selection. Especially rigs that were
designed for 2.79 wireframe mode.

Workbench: respect the duplication visibility flag

Fix uniform name

The uniform variable name was wrong.

UI: More changes in Fill panel

Fix some issues with pattern type.

Remove Onion Skinning override by Layer

This option is not required and only add complexity.

The UI panel was removed in a previous commit.

Uniform assign error fixed

Fix T55348: Renaming a marker can't cancel

Regression in a14005c070a1f

Fixed snake line taper error induced by combined batch.

Merge branch 'master' into blender2.8

UI: Remove duplicate "Layer" Header text

Now these panels are subpanels of Layer, so it's better don't duplicate name.

Python API: Initial 'imbuf' API

Support only basic operations new/load/write & resize.

Add now so we can extend as needed & more easily accept patches.

Seperated different algorithms into 3 files. Init code minor changes.

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

Conflicts:
release/scripts/addons
release/scripts/addons_contrib
source/tools

Separate the randomized factors into new variables

This makes it easier to disable in code.