Blender Git Loki

Revert "Fixup for "always use selection in core""

This reverts commit 535cf2c71409893748c21d00a7da32907fe54622.

Fixup for "always use selection in core"

In my previous commit [1] I forgot one of the if() calls. Handled it
differently now.

[1] dc1f491a506deafbd80f13b20783e477ef5f99fd

Pass depsgraph via Context to selection code

Selection: Always use new selection code when building with using core profile

Depsgraph and selection: Flush selcol on Depsgraph

Selection code needs to iterate over DEG_OBJECT_ITER otherwise we won't
get modifiers, dupli objects, ...

Also make selection respect selectability flag.

Review by: Sergey Sharybin

Alembic: shortened CacheFile.filepath to 1024 bytes again

As per discussion on 3128600a8ab2badd9ea39c80133f15f766794ec6

Alembic: fixed C++98 compatibility

Alembic import: added unit test for mesh deformation.

Merge branch 'master' into blender2.8

Remove show_backface_culling check in select engine

May add back so selection engine can read backface cull state
from from different engines.

Cycles: Fix access undefined macro on non-MSVC compiler

Also rremove trailing whitespace.

Cleanup: draw engine

- use DRW_engine prefix for engine types.
- use engine suffix for files that define a draw engine.
- remove engines from include path (they're only referenced once)

Draw Manager: add select engine

This does very little currently, but allows changing behavior for
selection drawing in the future.

Allow new selection in eevee & blender draw modes

Draw Manager: armature editmode selection

Eevee: World default shader.

- Use uniform color world for the world probe.
- Refactored the Fresnel expression to be better with Area Lights.
- Squared the roughness for default materials.

Eevee: Disable shadow rendering until we get proper update scheduling.

Performance is quickly getting poor when you have lights otherwise.

Eevee: Fix Square light with non uniform scale.

Remove duplicate character on previous commit

Cleanup: remove evil context for toolsettings