* License, desc for MongooseIM
MongooseIM used to be a fork, it is now a complete, exhaustive platform with many server-side and client-side components: check out the "MongooseIM platform components" https://mongooseim.readthedocs.io/en/latest/
Also, the license of the XMPP server component is GPL, like ejabberd obviously.
* Update README.md
More descriptive description. Update license to GPLv2.
