Supports the updated starring API as mentioned in issue #188.

There is now a new struct called StarredRepository which holds a Repository and the new `starred_at` timestamp.
For now there is a special media type to request the new API. I've added a TODO for it to be deleted when the new API fully launches.

There's no way of serializing/requesting an empty required_contexts that
is needed for bypassing the commit status checks for the ref.

It's a breaking change but will allow to serialize an empty array and
omit empty value as expected.

Add complementary test for patterns with pipe

Fixes #185.

Memberships API is now official.

https://developer.github.com/changes/2014-09-16-finalizing-the-organization-and-team-membership-apis/

Fixes #192

Deployments API is now official.

https://developer.github.com/changes/2014-11-25-the-deployments-api-is-official/

Fixes #189.

Both have been deprecated.

Fixes #190.

- AddTeamMember: https://developer.github.com/v3/orgs/teams/#add-team-member
- RemoveTeamMember: https://developer.github.com/v3/orgs/teams/#remove-team-member

Also:
 - add PingHook to RepositoriesService
 - move ListServiceHooks to Client, since hooks are no longer just for
   repos.  Leave behind Repositories.ListServiceHooks for backwards
   compatibility

Fixes #178

The client_id and client_secret URL variables,
containing sensitive app information, are leaked
to users if the Go error is returned to them. To
prevent this, sanitizeURL redacts the fields from
ErrorResponse's Error method. Therefore making the
error message safe to expose to users.

(not added to AUTHORS - Google owns copyright)

RepositoryListByOrgOptions doesn't have a `Sort` field

As per https://developer.github.com/v3/pulls/#list-pull-requests

Renamed test method

Changed from PatchUrl to PatchURL

The RepositoryContent struct doesn't quite map to the API because it is
missing a download link.  This link is very useful because while the API
doesn't allow large files to be downloaded, the link allows the raw
files to be downloaded outside the API.

The issue is that the JSON tags on the contents struct were wrong.  They
were missing the underscore.

Unfortunately this is a breaking change, and having a pointer to a slice
is not very common, but is needed in this case to allow clearing an
issue's labels.

Fixes #181

Fix up doc formatting, use spaces for alignment (tabs are for indentation only).

This fixes issue where if user has tab width other than 4, some lines will become misaligned. For example, see the package description at https://godoc.org/github.com/gorilla/mux.

This reverts commit aee21eb0bd.

Fixes #119.

Since Goji accepts the underlying version of this type (i.e., the raw
function), and since it doesn't use web.Handler in the same way as the
net/http ecosystem uses http.Handler, there's really no reason to ever
use web.HandlerFunc.

This is a breaking change. Developers who previously used the
web.HandlerFunc type are encouraged to inline it into their own
projects.

This change exposes a new type, Match, which represents a matched route.
When present in the Goji environment (bound to the key MatchKey),
routing will be skipped and the bound Match will be dispatched to
instead.

In addition, the Goji router has been exposed as a middleware using the
Match mechanism above. This allows middleware inserted after the router
access to the Match object and any bound URLParams.

Fixes #76. See also #32.

Fixes references to depreciated goauth2 libaray and replaces example
with the recomended oauth2 implimentation.