Merge pull request #97 from d-j-a-y/master

BugFix #84  -  Select TimeTrack row and press enter crash
Fix bug #543
http://www.synfig.org/issues/thebuggenie/synfig/issues/543
Create new type - Transformation
Add Transformation type into ValueBase
Ability to convert Transformation into ValueNode_Composite
Add 'transformation' parameter into Layer_PasteCanvas. Unused yet.
Add transformation value type into Callrenderer_Value
Duck for Transformation::offset
Duck for Transformation::angle
Scale ducks for transformation
Add origin_transformation parameter into Layer_PasteCanvas
New transformation mode for Layer_Pastecanvas (cairo only)
Implement new transformation mode for Layer_PasteCanvas in studio
Improve transformation functionality, add link to origin in param
Implement interface to work with origin_transformation
ValueNode_BoneLink converter
Allow to modify origin by pressing 'space'
Allow to select bone from combobox in BoneLink
Save/load
Allow to edit origin when transformation linked