Blender Git Loki

C Logging: use instead of printf for messages

- See `--log` help message for usage.
- Supports enabling categories.
- Color severity.
- Optionally logs to a file.
- Currently use to replace printf calls in wm module.

See D3120 for details.

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Alternative guide curve setter function that works better for RNA.

Move guide curve into a nested struct, so it can be replace in one operation.

fix for setting lower x linear limit

Disable unfinished code.

Merge branch 'blender2.8' into hair_guides

Initial system for generating guide curves from groom.

Merge remote-tracking branch 'refs/remotes/origin/blender-v2.79b-release' into fracture_modifier

Fix compiler error in Windows

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/blenkernel/intern/object.c

Fix parameter list errors after merge

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/blenloader/intern/readfile.c

Merge branch 'blender2.8' into asset-engine

Conflicts:
release/scripts/startup/bl_ui/space_filebrowser.py

Typo

Merge branch 'blender2.8' into topbar

Fix compiler warning

Merge branch 'blender2.8' into greasepencil-object

Fix wrong color pointers for old files

Some files created for Hero during development had wrong color pointers. This fix this error and avoid a segment fault.