Add your GH Enterprise host to the list of known hosts:

  $ git config --global --add hub.host my.git.org

Configure your username and token for this host:

  $ git config --global github."my.git.org".user mislav
  $ git config --global github."my.git.org".token 1234abcd

Now a lot of operations should work for repos that were cloned from "my.git.org".

The default host is still github.com but this can be affected with the
`GITHUB_HOST` environment variable.

  $ GITHUB_HOST=my.git.org git clone myproject

Closes #98

Closes #113

GET requests that not necessarily require authentication will be
performed unauthenticated if GitHub user/token aren't present.

Fixes #111

Closes #112

CLoses #109

Closes #65, references #49

Closes #75

Closes #106

Start handling repos, branches, remotes and GitHub projects in an
object-oriented way.

Eliminate global objects accessed via constants such as GIT_CONFIG
or REMOTES.

Closes #93, references #65, references #49

Closes #91

references #83

GitHub doesn't support ranges with two dots, only three. With these two
being equivalent in case of linear history, it's generally safe to convert
the range pasted on the command-line to three dots. This is to avoid
confusion where GitHub would display a 404 page otherwise.

See "specifying ranges" in the `git-rev-parse` man page.

closes #80

Supply these global flags to subcommands. Closes #69

closes #54