Update Rails to 4.1.1 & bcrypt-ruby has been renamed to bcrypt.

* `bcrypt-ruby` now `bcrypt`

    Ref. https://github.com/rails/rails/commit/53f1ab523bbf4f1764e3e24f26c4ed1db61b69e7 and https://github.com/codahale/bcrypt-ruby/pull/86.