Blender Git Loki

As discussed during meeting, Changed curve length/tilt markers to indicate direction.

That is, a 3D curve now displays as ->->->-> instead of -|-|-|-|.

Comparing the two, I didn't find the arrow display any more confusing then the straight lines when dealing with loops and tilt variations. Sharp turns are more likely to display crossed lines though.

Others should feel free to disagree and make it better.