Figure out how to make calls to a JSON API from a Sublime Text plugin

[cheshire137]

In Python, we need to make a call to https://developer.github.com/v3/gists/#create-a-gist to create a Gist. So we need to POST data and then parse the JSON response. Part of #3.

[cheshire137]

http://isbullsh.it/2012/06/Rest-api-in-python/ looks useful.