re-generate spec helper files
fix omniauth mocking
automatically require rails_helper from specs
Merge remote-tracking branch 'origin/master' into rspec-rails-redux

Conflicts:
	spec/commands/approval/initiate_cart_approval_spec.rb
	spec/spec_helper.rb
let DatabaseCleaner handle cleaning up database between specs

rspec was doing this in addition
remove unnecessary requires from specs
upgrade guard
Merge pull request #101 from 18F/rspec-rails-redux

regenerate spec config from rspec-rails