Update to oauth2. Renamed some files.

Updated migrations to latest easy_auth version.

Remove coockie_jar, not being used.

Cleanup spec helper.

Bump mocha to rspec compatible version.

Replace fakeweb with faraday since oauth2 uses it anyway.

Cleanup vcr rspec support file.

Update and rename test file from requests to features.

This convention was introduced by capybara > v2.0

Update vcr cassete for linked api responses.

Fixed page.source call in authentication spec.
Merge pull request #2 from stas/update_to_oauth2

Update to oauth2