Blender Git Loki

Implement new rotation manipulators

Add view aligned circle manipulator for free translation

Remove unused includes

Use more modern OpenGL for arrow manipulator drawing

Could/should do hings like sharing VBOs between manipulators, using own shader, use GPU_matrix API, etc but would need to figure out requirements some more first.

Get tranform manipulators type toggle to work; increase arrow line-width; cleanup

Support drawing arrow manipulators while translating

Finish basic transform manipulators for translate

Initial implementation of a new transform manipulator

This commit adds the basic framework for the new transform manipulators and also includes working manipulators for translation.

Wasn't really happy with the new transform manipulators code in the custom-manipulators (used to be wiggly-widgets) branch, especially since it reused quite some code of the old manipulator which is messy as hell. I decided to refactor this code by rewriting it from scratch. I'm doing this in an own branch so it can easily be merged into blender 2.8 when ready.

The new transform manipulators are part of the space_view3d module, IMHO they fit better into this than into transform module.