Tests: Overlays
First tests to a Module. Input events tested.
Email Module fully tested.
Update FxA client and manager with latest gecko changes
Merge pull request #32 from ferjm/fxa_proposal_complete_ferjm3

Fxa proposal complete ferjm3
Hook up to the FxA client!

* Start to hook up error screens based on responses.
* Rename FxModuleServerRequest->checkPassword to signIn, and createAccount->signUp