Refactored Bifunctor hierarchy, added instances, introduced Invariant, started to introduce Bifoldable hierarchy

git-svn-id: http://highj.googlecode.com/svn@193 bdcd8b68-9dcc-aa74-f1b9-b4da3e61a8cc
Edited wiki page NamingConventions through web user interface.

git-svn-id: http://highj.googlecode.com/svn@194 bdcd8b68-9dcc-aa74-f1b9-b4da3e61a8cc
Edited wiki page News through web user interface.

git-svn-id: http://highj.googlecode.com/svn@195 bdcd8b68-9dcc-aa74-f1b9-b4da3e61a8cc