Joints move with their parents.
Validate joints upon write.
mixup offset of outlets.
Fixing an issue with .psd files with effects in them.
scale outlet handles.
offset outlet handles.
fixup uuids.
Restrict Joints to be displayed when not animating.
Merge pull request #309 from jtwigg/develop

Develop
Merge pull request #308 from slembcke/develop

Fixing an issue with .psd files with effects in them.
Merge branch 'develop' of github.com:apportable/SpriteBuilder into develop-steffen

Conflicts:
	SpriteBuilder/SpriteBuilder.xcodeproj/project.pbxproj
added sprite kit button/control plugin nodes
pbxproj update with button/control plugin nodes
Abstract PlugIn nodes no longer dealloc immediately

Under MRC they must have remained in memory but were inaccessible. I decided to store them in a separate dictionary just to prevent any odd issues due to abstract "base" plugins deallocating.
pbxproj with icon fixes for SBButton plugin

also prevents SBButton plugin from occasionally not appearing at all (and removing all button instances from the ccb because of it)