Merge pull request #259 from github/warn-on-500s

We should only WARN on http codes we intend to retry on

Merge pull request #143 from github/github-service-improvements

GitHub Service Improvements

Merge pull request #112 from github/jasonmacgowan/422

Bump version

Merge pull request #60 from github/entitlements-upgrades

Entitlements Upgrades

Merge pull request #56 from github/team-improvements

Team Improvements

Merge pull request #35 from github/repo-updates

General Repo Updates

Merge pull request #34 from github/bump-version

bump version

Merge pull request #30 from chrisgavin/fix-team-cache-for-multiple-in…

…stances

Merge pull request #32 from github/jasonmacgowan/acceptance

Pin rack version for acceptance test mock servers

Merge pull request #29 from github/bug/ignore_not_found

Bug: Support cases where `ignore_not_found` is not provided