Add MIT license
Add MIT license

After getting permission from (as far as I can tell) all contributors:
Casey Chu, Jordan R.A., Jonathan Chang, Alex Ozdemir, Kate Woolverton
Scott Chow, Olivia Watkins, and me

Fixes #4

hmc-portal2/hmc-scheduler,hmc-portal2/hmc-scheduler,hmc-portal2/hmc-scheduler