first pass at removing setDefaultAttrs logic to speed up node instantation performance
refactored transition logic and added getAttr method
first pass of new Label plugin
added arrow support for new label plugin
changed label rect drawing from Polygon to Shape to support rounded corners soon.  Also wrapped the text and rect inside of an inner group so that the label can be positioned based on the pointer tip
moved Path to Plugins namespace
added getWidth() and getHeight() methods to Label
fixed logic in Text that was accessing padding attr directly without using the getter
label offset is now adjusted whenever the text is updated
Merge branch 'master' of github.com:ericdrowell/KineticJS