Dog Food Seed

[sirinath]

Move the repos at least under the author's control to use Seed. I see some of the repos the author contributes to like those in https://github.com/sparsetech does not use it yet.

This would mean one will hit issues 1st hand and this will get improved.

Also perhaps this will mean there would mean more committed to maintain and improve it also, which would help adaptation.

How this will be a truly great build system not only for Scala but for Java, other JVM languages and even native and other languages.