[service.remotedebug] Implement RemoteDebug interface

[rodneyrehm]

We want to use RemoteDebug (or any other intrface allowing the same thing) to get access to the browsers' DevTools in order to provide things like assert.console and log.console (dump.console?) actions (as a first step, even if only chrome supported this, it would help)

This may - or may not - be tightly coupled with dalek-driver infrastructure