v0.28

 - Added documentation destined for type checking and assertions, as well
   as wrappers, to Bubblegum::Object::Universal.
 - Removed AUTOLOADing, Added standard assertions to
   Bubblegum::Object::Role::Item, Started depreciating
   Bubblegum::Constraints.
 - Added tests and documentation to support the rebasing concept.