Move to a multi segment namespace

[danielcompton]

When compiling a ClojureScript project I get this warning

WARNING: domina is a single segment namespace at line 1 file:/Users/user/.m2/repository/domina/domina/1.0.3/domina-1.0.3.jar!/domina.cljs

It would probably be better to move to a multi segment namespace, single segment namespaces are generally avoided

[pandeiro]

I also think it would be nice to get rid of those warnings.

Maybe this could go in an upcoming 1.1.0 release as a minor breaking change?

[wmealing]

This prevents figwheel live reloading from reloading code.

[karneaud]

+1 for prevent reloading bug