Accept: application/vnd.github.beta+json

The GitHub API version is currently in beta. [The `beta` media type](/v3/media/)

property will be valid until sometime in 2013. A notice will be given closer

to the actual date.

We consider the "beta" API unchangeable. [File a support issue](https://github.com/contact)

if you have problems.

These changes are _not_ implemented, just planned for the next major API version.

* `[ ]` Standardize on existing `*_url` attributes for hypermedia. Remove all `_links`

objects.

* `[✓]` <del>The '/repos/:owner/:repo/hooks/:id/test' action becomes

'/repos/:owner/:repo/hooks/:id/tests'.</del>

* `[✓]` <del>The '/gists/:id/fork' action becomes '/gists/:id/forks'.</del>

* `[ ]` Gist forks/history objects become separate API calls.

* `[ ]` Gist files object is not returned on Gist listings.

* `[ ]` Commit schema will change to be [more consistent](https://gist.github.com/3a2e5779588e21b0c0f3).

* `[ ]` `master_branch` becomes `default_branch`.

* `[ ]` `integrate_branch` on the [repo API](/v3/repos/#get) will no longer be

returned.

* `[ ]` `merge_commit_sha` on the [pull request API](/v3/pulls/#get-a-single-pull-request)

will no longer be returned.

* `[ ]` Use the `private` attribute when creating a private repository,

instead of setting `public` to false.

* `[ ]` Use JSON to POST to the "repos/:owner/:repo/forks" endpoint, instead of a query string.

* `[✓]` <del>User Emails come back [as a hash][v3-email] instead of a string.</del>

* `[ ]` Remove the unused "bio" field for Users.

* `[ ]` When listing the contents of a directory in the [Repository Contents API](/v3/repos/contents/#get-contents), fix the `type` value returned for submodules: change the value to `"submodule"` (instead of `"file"`).

* Removed API v1 support

* Removed API v2 support

* `gravatar_url` is being deprecated in favor of `avatar_url` for all

responses that include users or orgs. A default size is no longer

included in the URL.

* Creating new gists (both anonymously and with an authenticated user)

should use `POST /gists` from now on. `POST /users/:user/gists` is no

longer supported.

* Removed support for PUT verb on update requests. Use POST or PATCH

instead.

* Removed `.json` extension from all URLs.

* No longer using the X-Next or X-Last headers. Pagination info is

returned in the Link header instead.

* JSON-P response has completely changed to a more consistent format.

* Starring gists now uses PUT verb (instead of POST) and returns 204.

[v3-email]: /v3/users/emails/#future-response