Add .ruby-gemset and .ruby-version.
Fix typo.
Remove test/e2e.
Remove Protractor from Grunt test task.
Add validation error messages to registration form.
Downgrade RSpec to make failing specs pass again.

This reverts commit 0e3c111a16115be06f47068ac54dedb06302d78c.
Make failing controller spec pass.
Upgrade to RSpec 2.99.
Run transpec.
Upgrade to RSpec 3.
Upgrade to RSpec 3.1.