Blender Git Loki

Initial Refactor of code preserving caches during undo.

This is a proof od concept, it only implements new system for bSound
data-block as test subject.

GPUOffScreen: Remove the sample parameter

This is because the DRW module is no longer compatible with drawing using
MSAA.

This also change the Python API.

Decoupled splitting from branched path integrator.

Made two functions static to silence a warning.

Fix T78527: GPencil Mirror modifier is inconsistent with Mesh Mirror

The grease pencil mirror was using the current axis rotation but the mesh modifier doesn't use it.

BuildbotLTS: Project Documentation

Added README.md containing a overview of the project.

UI: Small Tweaks to Modifier Layouts for Consistency

These changes are smaller, made based on feedback and a pass on all
the layouts for clarity and consistency. The Multires modifier UI will
be addressed in a separate patch. Here is an overview of the changes:

Renaming Options:
- Build: "Start" -> "Start Frame"
- Curve: "From Radius" -> "Size from Radius"
- Screw: "Calc Order" -> "Calculate Order"
- Displace, Warp, Wave: "Texture Coordinates Object" -> "Object"

Move Mode Toggle to Top & Expand:
- Bevel, Boolean, Normal Edit, Subdivision

Use Columns for Tighter Spacing:
- Displace, Explode, Ocean, Particle Instance, Remesh, Shrinkwrap,
Solidify, Warp, Weighted Normal, Wave

Misc:
- Bevel: Set inactive properties for vertex bevel
- Mesh Sequence Cache: Remove box for cache file
- Skin: Don't align "Mark Loose" and "Clear Loose"
- Array: Expand relative offset subpanel by default
- Array: Move start cap, end cap to a new subpanel
- Bevel: Move width type above width

Differential Revision: https://developer.blender.org/D8115

Fluid: Added offset to control frame range

Added an offset field to control when to load the simulation files. Since this is a very small but helpful addition it is in my view safe to commit at this point of the bcon cycle.

Fix T78533: Skip image texture if image filepath is empty

First coplanar boolean test passes.

Implemented sorting of coplanar triangles.
Also, make format.

Export smooth groups for smooth shaded meshes.

Cleanup and silence compiler warning

Fix log printing error

Merge branch 'show-python-eval-logs' into soc-2020-info-editor

Add experimental support for catching python stdin/out

Python evaluation logs will be printed as info report

Fix T78513: Modifier apply shortcut not displayed

We can't specify the "apply_as" enum value, even though it's the default.

Fix GPL license copyright year

Fix T78054: Crash Editing Instanced Objects with Tangent Normals

Similar track as for normal mesh. Don't store the tangent normals in CustomData
of the mesh, but in an unassociated CustomData instance.

Reviewed By: Cl�ment Foucault

Differential Revision: https://developer.blender.org/D8161

Fix T77686: EEVEE environment pass with film transparency

When the film is set to transparent the environment pass should still be
rendered solid. otherwise it renders black.

Reviewed By: Cl�ment Foucault

Differential Revision: https://developer.blender.org/D8046

Convert local logger to global

- convert prints to CLOGs