Merge pull request #244 from github/clarify-supported-media-types-for-repo-contents-api
Fix URLs in symlink example response
Required UA post
Announce deprecation of merge_commit_sha
Document file sizes supported by Repo Contents API
Document submodule handling in Repo Contents API
Commit statuses now work for all branches and tags
Blog post for branch/tag statuses
Document app client_id for Authorization resource
Update D3 guide