[TASK] Update to Rails 4.1.1.

Resolves: GET-3
Merge pull request #44 from braingourmets/task/rails-411

[TASK] Update to Rails 4.1.1.
[TASK] Update the gems.
[TASK] Use the latest Ruby 2.1 release for Travis.

Starting with Ruby 2.1, Ruby uses Semantic Versioning. Selecting
version "2.1" in the Travis configuration means that the latest
2.1 patch release will be used.

https://github.com/travis-ci/travis-ci/issues/2220#issuecomment-42263699