Changed EventDispatcher.dispatch() to return same Event.
Improved Localizer, but not yet functional.
Unified proposal mechanics with Proposal<T>.
Cleaned up Patterns, moved package to EH.
Updated old code to handle Pattern move/cleanup.
Used proposal mechanics with more existing code.
Cleaned up WorldEditException, link with local Localizer.
Renamed factory method of EditSessionFactory to newEditSession(), fixed patterns in EditSession.
Updated block matching algorithm with new approach/syntax.