Upgrades capybara 1.0.1 -> 1.1.x

* Renames request specs to feature specs
Fixes js code that toggles the save button so that it works correctly

It was treating non-credit card payment options like credit card
payment options.
Adds support for running js tests on Travis
Ensures that Save and Continue button is not disabled unless needed

Makes sure that the Save and Continue button does not get disabled when
there are no previous credit cards.
Merge pull request #8 from mscottford/topic/fix-save-button-toggle

Fix save button toggle