Add README and license

Fleshed out the README somewhat and added an MIT license.

Change-Id: I163f7d6243245e9f04e8dc82d32d93f89ee581da
Reviewed-on: https://gerrit.causes.com/22982
Reviewed-by: Aiden Scandella <aiden@causes.com>
Tested-by: Preston Guillory <preston.guillory@causes.com>