tighten up mouse overlays for transformations.
Merge branch 'develop' of https://github.com/apportable/SpriteBuilder into develop
working Bayazit Decomp.
concave edges allowed.
robust handling over intersects for shape editing.
delete shapes nodes by right click
Merge branch 'develop' of https://github.com/apportable/SpriteBuilder into chipmunk

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
don’t allow acute angles that are too small.
more fixture restrictions.
serialize polygons to disk and to binary write.
FIX circle shapes.
plugin added and displayed to scene.
working joints serialization and deserialization.
joints displays on Sequence.
outlets renderings.
outlets dragging with tracer line.
assign outlets to bodies.
use AR node coords.
exposing node properties.
working serialization and deserialization.