Naming conventions for official Vert.x projects

We should use the follow naming conventions for Vert.x projects

For language implementations:

io.vertx:vertx-lang-{name}:version

E.g.

io.vertx:vertx-lang-js:1.0 io.vertx:vertx-lang-groovy:1.0

For client implementations:

io.vertx:vertx-{name}-client:version

E.g.

io.vertx:vertx-mongo-client:1.0 io.vertx:vertx-jdbc-client:1.0

For others:

io.vertx:vertx-{name}:version

E.g.

io.vertx:vertx-jca:1.0 io.vertx:vertx-codegen:1.0