Add repo LICENSE.md

[planemad]

In addition to licensing the data https://github.com/datameet/maps/issues/56, we should add a repository LICENSE.md for the code that is mostly applicable to the website content and any processing scripts in future if any

Proposing that we adopt a simple MIT license, unless there are other opinions.

Approval

• [x] @katehara
• [x] @thejeshgn

[thejeshgn]

+1

[planemad]

Capturing ✅ from @katehara