Capybara: add gem
spec_helper: Added Capybara support
Add Integration Testing: bands_feature_spec
Integration test passing
Integration Test: Correct controller test broken

This test was broken by means of having a redirect
respond to POST to `/bands`.
Update integration test formatting

* Make RSpec output read more cleanly
* Relocate variable definition
Merge pull request #2 from Devbootcamp/add-integration-testing-to-challenge-repo

Add integration testing to challenge repo