Initial support for the Deployments API
Fix typo in docs
Decode payload field for deployments, deployment statuses
Only warn for API preview without explicit media type

Since the goal of the preview media type is to ensure developers
acknowledge the API is in preview and will likely change, we don't have
to show the warning if the media type is supplied in the method call.
Merge branch 'master' into deployments-preview
expect the payload to return properly decoded from GitHub
remove assigned variables
no sense in assigning the var then i guess
Update cassettes after API change
Run coverage for ruby RUBY_ENGINE only.
Merge branch 'atmos-deployments-preview'
Merge pull request #444 from octokit/run-coverage-on-ruby-engines

Run coverage for ruby RUBY_ENGINE only.