Implement bindings for debug-interface to use builtin console about rusty_v8

[piscisaureus]

I think you might have to implement your own Console object.
AFAIK the built-in console object only forwards messages to the chrome inspector console.

[bnoordhuis]

debug-interface.h is a private header, it's not part of the public API. It's used by d8, but d8 uses all kinds of internal V8 APIs.

I can't quite divine from the twitter thread what the actual problem is (cc @MylesBorins, maybe you can clarify) but if you want to intercept console messages, the V8InspectorClientImpl::console_api_message() method I added in #252 lets you do that.

[MylesBorins]

So at a very very high level all I want to do is make the console object actually print something (wild I know). I can think of a couple different creative ways to make it work... but if possible I would like to do it idiomaticaly.