Blender Git Loki

Remove duplicate nodes

Add operator `POSELIB_OT_blend_pose` for interactive pose blending

The operator doesn't blend yet, but it does allow temporarily applying the
pose, switching between the original and the given pose with Tab, applying
the pose with Enter/LeftClick, and cancelling with Esc/RightClick.

GHOST: Vulkan: Add compile time option to bypass required features

This makes it possible to test the vulkan implementation on all platforms
(mainly MacOS) even if all required features are not supported.

GPencil: Test multiple Lattice modifiers

Vulkan: Add basic implementation of textures

Adds basic texture creation and update as well as texture view support
for attachements.

Vulkan: Fix compilation after merging

VulkanMemoryAllocator: Add new extern library

This library is used to simplify memory allocation / management for Vulkan.

Merge branch 'master' into cycles_texture_cache

Merge branch 'master' into temp-lineart-contained

Merge branch 'master' into temp-gpencil-io

Merge branch 'master' into greasepencil-object

USD Import: UsdPrimReader interface cleanup.

Removed empty add_cache_modifier() function and made
create_object() abstract.

USD Import: naming convention fix.

To be consistent with the convention used in the USD exporter,
updated class member variables to consistently use snake case
and trailing underscores instead of the m_ prefix.

USD Import: snake case for function names.

As part of code cleanup, now using snake case consistently
for class member function names, to match the convention
used in the USD exporter code.

USD Import: added blender::io::usd namespace.

Added blender::io::usd namespace where it was missing, to
conform to the convention used in the USD exporter code.

USD Import: removed unneeded include guards.

USD Import: use pragma once in headers.

Replaced include guards with pragma once directives,
to conform to the conventions used in the existing USD
export code.

USD Import: removed commented out code.

USD Import: removed WM_reportf() trace calls.

Add ico sphere primitive