Use configuration files to enable or disable the new dyncom interpreter.

Not sure it makes sense to have this in addition to "DynCom". DynCom is short for dynamic compiler, which is the same as a JIT. It's just that for now, I only ported the "interpreter" portion of SkyEye's DynCom CPU core. Presumably, I'd port the rest when we care more about speed. Alternatively, you could name the other one "DyneCom_Interpreter" or "FastInterpreter" to avoid confusion?