mention login rate limit
Clarify status codes
don't mention ip-based lockout, just user-based
Merge pull request #62 from github/mention-login-rate-limit-and-401-error

Document the failed login limit and lockout scope for API
merge
Merge 'upstream/master' into internal/master
Merge 'upstream/master' into internal/master
Merge pull request #66 from github/improve-link-header-examples

Improve link header examples
Merge 'upstream/master' into internal/master
document limit in PushEvent commits
simplify and inline note about commits limit
Merge pull request #67 from github/pushevent-limit-commits

Document limit in the number of commits returned by PushEvent
document limit in PushEvent commits
Merge branch 'master' into internal-master
document oauth flow with no scopes param
Merge pull request #70 from github/oauth-no-scopes-param

Document OAuth web flow when the scope parameter is not defined
Document commit list limit for Commits Compare API
Document commit list limit for Pull Request API
update commit comparison note
update pull request note