Blender Git Loki

GP: Draw: Speedline guides

Initial commit for artist feedback.
Provides drawing guides or constraints for drawing lines.

Notes:
UI Panel in 3D view. Some settings only have keyboard access at the moment.
Alt-C: Screen space position of circular guide
C: Circular guide
L: Parallel line guide
M: Flip direction 90� degrees
V: Freehand mode (turn off)
J/K: For line guide, rotate guide (alt 45�, shift 15�)
Alt-L: Set angle to that of the last stroke (useful to align to freehand strokes)
Ctrl-L: Set angle to 0�

Todo:
On screen guidelines