Add MIT license text

I noticed that the project is listed as being licensed under the MIT license.

Per the [ChooseALicense.com site](http://choosealicense.com/licenses/mit/) (Github's guide), it is recommended that you create a LICENSE file to contain the text of the license, including the year and your name.

I've added this file with the requisite parameters to ensure everything's legit.

This also resolves #19 in the issues list.