fixes issue 263 -- introduces ability to "deduplicate" bindings.  all BindingImpl subclasses now implement equals/hashcode properly and duplicates can be erased by throwing them into a set (preferably a LinkedHashSet to preserve the order of the elements).  no new API methods.

git-svn-id: https://google-guice.googlecode.com/svn/trunk@1178 d779f126-a31b-0410-b53b-1d3aecad763e
17 files changed