Blender Git Loki

Cleanup: fix grammar in comments.

Merge branch 'master' into greasepencil-object

Merge branch 'master' into greasepencil-edit-curve

Merge branch 'master' into lanpr-under-gp

Merge branch 'master' into cycles_texture_cache

LineArt: Remove duplicated "use" phrase in modifier UI.

Version Blender 2.83.3 release

LineArt: Optimize chaining code for better handling for organic features.

default stiff a little lower

fast svd

Outliner: Bone constraint drag&drop

Support bone constraints for drag and drop. A few issues still exist:
* Indices for all types for reorder aren't always correct.
* Bones are "supported" for modifiers and shader effects when they
shouldn't be.

smart pointers (sue me)

Merge branch 'master' into newboolean

fixed tree bug

updated embedded mesh

Fix build errors: avoid `uint` with Vector size() function.

https://wiki.blender.org/wiki/Style_Guide/C_Cpp#Integer_Types

Merge branch 'master' into soc-2020-io-performance

Support NURBS curve import & minimal groups support.

There's a problem though: the curve's vertices appear in edit mode
just fine, but the black line doesn't appear in object mode. But the code
so far should've been committed.

Also, some semantics have been made consistent which needed mesh
related functions/ members to be edited:
- `add_object_to_parent` for mesh is now similar to that of curves.
- `OB_MESH` is the default type of a raw object.

`copy_string_to_int` is also added to support multiple `int` values.

revising mesh types

Cleanup: Remove unused functions and headers.

Explicitly specify empty string.