Blender Git Loki

Code review: Rename ViewLayerAOV to AOV in the API.

Merge branch 'master' into tmp-eevee-aov

EEVEE AOV: Added test case

EEVEE AOV: Do not render/show conflicting AOVs

EEVEE AOV: Validate AOV Names

Merge branch 'master' into tmp-eevee-aov

EEVEE AOV: Enable AOV node for any render engine

EEVEE AOV: Add Support for World Based AOV

Fix AO Render Pass selection in 3D Viewport

Fix crash volumetric shaders + Use custom Closure when no matching AOV

EEVEE AOV: Add support for 64 AOVs

Also adds fixes ShaderToColor node.

EEVEE: Add support for material AOVs

During rendering up to 8 AOVs are supported. The implementation in D7010
used to many resources and was limitted. In this implementation the
resources are 1 accum texture and 1 ubo of 48 bytes per AOV to render so
we could remove this limitation.

Not supported yet is world shader AOV's. This could become the next
target.

GPU: Added support for AOV Output node.

Not connected to anything in EEVEE.

EEVEE-AOV: Data management + UI

- Adds a ViewLayerAOV
- Add layer kernel functions to modify and validate AOVs
- Add Operators to add/remove AOV
- Enable the AOV panel for EEVEE
- Enable the AOV render pass selection in the viewport.

Note that no changes have been made to EEVEE yet.