README update for AGPLv3 [MULTI-LICENSE]

Just to be extra clear:

This code [b]IS[/b] copyrighted, but you have a license to use this code with a few legal restrictions. If you use this code for any purpose (*noncommercial or otherwise*) ...

... blah blah blah, subject to whatever jurisdiction or legal process applies, etc. etc. etc.

I'm releasing my **own code** work on the gekko project under [AGPLv3](https://github.com/kuzetsa/gekko/blob/c325e25ba78fd9657dff275a4f901311755e7c67/LICENSE.md)