Changes to synch up with Java3e:
- deleted JavaElement, BodyElement which didn't add anything useful
- deleted NestedClass and the association which described nesting, contents can be used instead
- deleted extends/extendedBy which is replaced with MOF subtype/supertype
- deleted the clumsy main diagram
- moved the MOF inheritance details to the MOF binding diagram
- deleted "final" on JavaParameter, don't know what that was supposed to be
- deleted the Category junk
- changed the Block-typed attributes on Field, Method, Initializer to be associations to Block

Outstanding questions/issues:
- JavaParameterKind should go away if we get the base Parameter kind fixed up