New release naming

The next release is no longer following Cljs compiler versioning.

While changing stuff, I decided to also move the repository from adzerk-oss organization to boot-clj organization.

I'm now also wondering what other names to change:

- group-id: Maybe `powerlaces` (used by boot-cljs-devtools) or perhaps `boot-clj` (same as github org)
- namespaces: Even the namespaces refer adzerk, could be changed to refer the new group-id `powerlaces.boot-cljs` or `boot-clj.boot-cljs` (ugh), or perhaps just `boot-cljs.core` or `boot-cljs.tasks`. Most Clojure libraries don't start namespace names with group-id.
- Versioning: if we use different group-id, we could also start versioning from 1.0.0 instead of 2.0.0.