Blender Git Loki

Code refactor: use split variance calculation for mega kernels too.

There is no significant difference in denoised benchmark scenes and
denoising ctests, so might as well make it all consistent.

Code refactor: remove rng_state buffer and compute hash on the fly.

A little faster on some benchmark scenes, a little slower on others, seems
about performance neutral on average and saves a little memory.

Code refactor: add WorkTile struct for passing work to kernel.

This makes sharing some code between mega/split in following commits a bit
easier, and also paves the way for rendering multiple tiles later.

Fix T52645, T52645: AMD OpenCL compiler crash with recent drivers.

Work around the bug by reshuffling code.

installdeps: Fix building numpy with newer py system...

Many thanks to Jens Verwiebe for investigating and finding this fix.

Fix T42489 and T52936: Loading blend with minimized window results in crash or empty screen on windows.

Reviewed By: @brecht , @sergey

Differential Revision: https://developer.blender.org/D2866

Fix error copying smoke modifier uv layer

Tssst, we use USA english, not Oxford one... :P

Fix i18n messages extraction script, and a few more UI messages...

Fix T52982: Join operator with context override crashes Blender 2.79

Fix T52923: Circle diameter is in fact radius

Cleanup: redundant casts

Docs: remove outdated PyAPI guide

PyAPI: fast keyword parsing for __import__

No functional changes.

PyAPI: fast keyword parsing for bpy.props

No functional changes.

Cleanup/fixes compilation warnings.

Mainly, shadowing variables and unused parameters.

Merge branch 'master' into soc-2017-normal-tools

Fixed error in mod with many loops sharing edge.

Also removed redundant function and replaced its definition to BKE_mesh.h

Merge branch 'master' into soc-2017-normal-tools

Merge branch 'master' into soc-2017-normal-tools