Neater package details

Hello, can I kindly request you pick a license for this project please? There's a simple but good post at [CodingHorror](http://blog.codinghorror.com/pick-a-license-any-license/), for why you should pick a license. [Github](http://choosealicense.com/) has a license guide too.

I added some changes to your setup file to make it a tiny bit better too. Also added MANIFEST and LICENSE files. The license stuff in setup.py and LICENSE.txt is obviously marked as TODO.