Alcina metamodel - registry, resolver and annotations

[nevella]

• RegistryLocation(s) -> Registration(s)
• Inheritance (less nuanced than TreeResolver, which can merge) - value=[Type:<CLASS,METHOD,ERASED_METHOD,INTERFACE>]. Can be on an annotation itself (e.g. @Directed) to override default behaviour (e.g. only ascend class
• MergeStrategy(Class<? extends AnnotationMergeStrategy>)
• AnnotationMergeStrategy :: getAnnotationClasses(e.g. Registration, Registrations), merge(List<List>),map(Annotation,List<Annotation),merge(Class from) :: List
• @Registration resolves from interfaces
• Document registration merge rules
• ClientVisible defaults to Inhertiance: all

[nevella]

Completed, with basically no changes from the spec