Akka HTTP based client

[analytically]

I'd be awesome to have a Akka HTTP based client instead of Ning. http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/http/client-side/index.html

[rigolepe]

That's indeed an interesting idea. The http client dependency is isolated in the code, so we're able to easily implement alternatives. When we go that way, we'll have to work with a dynamic dependency on the various number of clients that we support to reduce the number of hard transitive dependencies.