Roassal3 fixes
- fix in RSTransitionAnimation to handle a correct progress
- fix in fromNames: to handle one value
- Renamed RSClusterLayout => RSClusterTreeLayout
- removed calls on undefined methods
- added RSCircularAroundAVertexLayout
- added RSSelfLoopCPController for self loops
- comment and tests over RSEasel
- RSColorPaletteChooser is now fixed