Rails -> 4.1.1; Cleanup.

* Move .html.erb files to .erb.
* Make code easier to read.
* Update Capybara to 2.3
* Update RSpec to 3.0.0
* Update to Rails 4.1.1
* Move LICENSE -> License
* Move README  -> Readme
* Remove sparse unused files.
* Remove all those .keep files.
* Add a few files to the ignore.