The project doesn't have a license

[Brandon Shuliang He]

Hi @domluna, @baumanab, @swwelch,
Notice that our project doesn't have license, that's a little unprofessional for a open source project, especially there has much extends adoption and development in an online education project. "No license terms" means users don't know it can be used freely. Another reference is Can I call my program "Open Source" even if I don't use an approved license?.

So here I suggest the project add license, recommend we choose one of the below license, firstly because they're all Permissive Licenses, but they have different redistribution disclaimer:

• MIT
• Apache-2.0
• BSD-3-Clause

Regards,
Brandon

[Michael Virgo]

Added!