Closes #123

Closes #125

Closes #122

references #98

References #117

Closes #114

Closes #118, references #111

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

Avoids double-load in certain situations

CLoses #109

Closes #65, references #49

Closes #75

Fixes #107

Closes #106