Merge pull request #186 from mono/master

Added copy constructor to ActionInstant and overridding classes and reverse out Changes to FarSeer modules that were rejected.
wp8 changes to sync the assembly guid with the referenced buid.
Cascading Opacity, Cascading Color tests
fixed Issue #183
remove ccMacros.CCDefaultSourceBlending, ccMacros.CCDefaultDestinationBlending. Refactoring dealt with CCBlendFunc.
added a Center accessor for the CCRect.