ReadyTalk/avian — pull request #71 by jentfoo (2013-07-15 14:57:25+00:00)
Title: Fix ClassCastException in UnmodifiableMap as well as fix modifying unmodifiable structures through iterators

This merge request resolves #70. I added a new structure (UnmodifiableCollection) which UnmodifiableSet now extends. I also added new structures to prevent modification through the iterator.