Blender Git Loki

LANPR line rendering (summer of code)

LANPR Patch

This is the patch for soc-2019-npr branch. Now modified as containing only LANPR changes

This patch **doesn't include** the following:

- GPencil modifiers.
- Smooth contour modifier.
- SVG.
- Affected UI scripts.
- Freestyle changes.

Those above will be submitted in other diffs.

Differential Revision: https://developer.blender.org/D5442