Add README, LICENSE, package structure, tests, and update to API v3

I changed the license to the WTFPL (http://www.wtfpl.net/), and put it in a separate file. I also created a README file and added an example, and some documentation. Lastly, I made style changes to the code as well as updated it to version 3 of the api by changing the base urls, and removing the timezone parameter which is no longer used.

edit: since I opened this, I've added python package structure, and tests