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.
remove unneeded files
updated SPRITEKITPROJECTNAME to link with SK lib
added SpriteBuilder+SK submodule
PluginManager: added warning for missing icon file
BuildDistribution script: split off project generation (separate script), can run from any directory, reduced output to a minimum (errors, success or fail messages)
generate project script: added echo
SB project: added Run Script build phase where devs can uncomment lines in order to generate (update) the Xcode template projects on every build
build distribution cleanup, improved logging (avoid "rm: file does not exist")
SPRITEKITPROJECTNAME build fixes
working joints serialization and deserialization.