Publish on Maven central

[pshirshov]

Hi guys,

It would be nice to see this available on Central. It shouldn't be too hard to support publishing to sonatype on travis.

[djspiewak]

Actually it’s mostly just a matter of swapping plugins. I originally picked bintray because it’s a little easier and it allows forking of publication, which in practice it seems no one really cares much about. I’ll definitely move it over to sonatype in the next release.

[lutnos]

This would now be especially welcome, with the demise of bintray

[Erdemus]

Also, it would be really useful for compilers to be written on Scala Native. I'd like to help with building fat jar.