Changing mailboxes

Implemented feature to load different mailboxes
Added more test cases
Default route is now /mailbox/:mailbox
Autocomplete directive

Created an autocomplete directive for the to field.
Added unit tests.
Fixed lint errors.
Changed name of directive to only autocomplete.
Fixed a bug in compose.html.
Changed unit tests so they can access the directives isolated scope.
Updated angular to 1.2.0

Stepped the client and servers versions to 0.3.0