Remove focus in GA spec
Adjust the GA OAuth code so it will work with TrepScore

- The ENV variables we need have a different name.
- Pass the token into the Client and get the access_token from there,
  rather than setting up the access_token in the top-level Service
  subclass.
- The scope and redirect_uri params are not needed when setting up the
  authorize URL.
Raise a config error for bad accounts and profiles
Map the GA results to the names we expect
Guard now seems to require the cmd for rspec
Add docs for Google Analytics
Add an options param to oauth, refine the scope for GA

We need the options so we can provide the prompt param for GA.
Build the OAuth client from an OmniAuth strategy

This avoids repeating the Google URLs. The auth_code bit isn't needed
either.
There is no longer a need for the SCOPE constant
Improve now oauth? works, make the oauth options a hash by default
Merge pull request #27 from 25-ventures/feature/google-analytics-tweaks

Feature/google analytics tweaks