Use bin folder for Rails4.
Add rbenv files to gitignore.
Update i18n-spec dependency.
Update simplecov dependency to 0.9.0
Require sass for font-awesome.
Move matcher into subfolder.
Update specs and dependencies for RSpec 3.
Add case insensitive Capybara matcher.

Helpful when swapping between Selenium and Poltergeist.
Fixes Russian translation spec.

Bug introduced in commit 555df675f999f60cdb99681028841ac57217e567
Works fine with Poltergeist again.