Merge pull request #8 from Dantemss/master

Renames OpenStax::Accounts::User to OpenStax::Accounts::Account
2.0.0
alpha
Updated rakefile
Added group objects and API calls
Added user group API calls and caching to accounts-rails
Removed some duplicated dependencies
Fixed factories
More sync groups code
Added model specs and CodeClimate badge
Group API specs WIP
More specs
Added caching routine specs
Fetch group cache from Accounts too
User group syncing done on this side