Dev:Source/Data System/API

Blender Data API

• Indirect access for the UI, PythonAPI, Animation System and Operators.
  Other parts of the code will not be forced to use this api.
• Plan the Data API to override linked properties on a per property basis, (similar to ipos overriding some properties but not others)
• The API will need to receive data_get/set(context, data-pointer, property-id) - property-id could be a struct offset of, to avoid extra lookups.
• How do we handle listbases - object constraints, modifiers etc?, or better we dont try access these direct from the object.