Extended signal propagation to debug-enabled child process.

Signed-off-by: marco.minetti <marco.minetti@novetica.org>
Added modular CLI command support.
Added global.native namespace with node-specific references.
Added Worker, WebSocket and XMLHttpRequest classes.
Added global Exception class for managed error handling/remoting.
Added support for coloured console logs.

Signed-off-by: marco.minetti <marco.minetti@novetica.org>