Blender Git Loki

Workbench: Rework hair support.

Now hairs are shaded properly in workbench and support texturing.

I also added a 10% random normal direction per hair to have a bit more
variation in the shading. This is hardcoded for now.

DRW: Fix hair disapearing if emitter is culled.

Set the numshapeverts of bundles as soon as possible to avoid invalid array access.

Fix face bounday bmesh operator.

The start loop search function could return loops outside of the tagged faces.
The loops should always be of tagged faces, even when the vertex is part of
a tagged face. Otherwise it can create extra boundary vertices around untagged faces.

Merge branch 'master' into blender2.8

Cleanup: remove blockscale & handler

Replace with link_flag, currently unused,
needed for dynamic space types which is planned.

Align bundle root with the scalp surface and make sure rotation is consistent.

Merge branch 'blender2.8' into greasepencil-object

Edit menu: add Repeat Last and Repeat History

build_environment: support for msvc2017 and newer cmake.

-expanded build_deps.cmd with 2017 support, it can't locate msvc2017 so needs to be run from developer prompt.
-Newer cmake was unhappy with openal's cmakelists.txt
-collada has warning as error on and errored out on new msvc2017 warnings.

UI: use single column layout for particles

Also minor changes to other panels.

Patch by @billreynish

Cleanup: -Wswitch warning

Cleanup: missing parentheses

build_environment: fix paths in osl.diff

GPU: Fix texture being freed in threads without ogl context bound.

This is a dirty fix. A bit more cleaner approach would be to check if a
context is bound and delay the deletion only in this case.
Also we may want to do this orphan deletion at some other places than
wm_window_swap_buffers.

DRW: Add uniform name recording in debug mode.

DRW: Make the Procedural hair update part of the drawmanager.

Instead of relying on the engine integration which is redundant.

Eevee: Hair: Make SSR works with hairs.

Eevee: Cleanup unused Ghash

Eevee: Add shadow support for hairs.