Add LICENSE and README

Change-Id: Iba2bcae6073b7955a80bae4e1378e7ddcce3aff9
Reviewed-on: https://gerrit.instructure.com/22640
Reviewed-by: Nathan Mills <nathanm@instructure.com>
Product-Review: Duane Johnson <duane@instructure.com>
QA-Review: Duane Johnson <duane@instructure.com>
Tested-by: Duane Johnson <duane@instructure.com>