Fixes #486.
Closes #488.

Change-Id: I31ff003552dbffaca78c740b89d54150b81c525c

Fixes #420
Closes #423

Fixes #397.

Change-Id: I30ce336e3a36cf5758b9bf52b9dd77f7c1df5f27

This has been a long time coming; apologies for taking so long!

Fixes #187, #181, #14

- add new Scope type with values for each of GitHub's current scopes
- add String method to Authorization types
- doc updates

see 92bbb1ce51

This adds support and integration tests for editing branch protection.

Add a new error type, TwoFactorAuthError, which identifies the need to
include a one-time password when using Basic Auth for a user with
two-factor auth enabled.

An example of using both the new transport and error type can be seen in
examples/basicauth/main.go.

fixes #258

Fixes #119

RepositoryListByOrgOptions doesn't have a `Sort` field

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