Injector API restructuring

Injector API:
- Removed socket connection
- Added dynamic API for injections (injection is allowed in all time
after Injector was injected)
- Debugger protocol is extensible now!

Added v8-debug dependence
(Small binary API what allow to extend debugger protocol)
I prefer to leave current name of function, but follow your recomendation about returned value and overcomplicated passing of ```TARGET_FRAME```