Implement Connect RPC mechanism

[ikskuh]

For the standalone version of LoLa, implement means to allow scripts to be connected via a network interface.

The implementation could have the following interface:

Connect(hostname: string, [port: number]): object|void

Tries to connect to a LoLa script running at hostname:port. If port is not given, 5317 is used.

When the connection has been established, a new object is returned that can be used to access the remote script and invoke functions there.
The object will have all functions defined the remote script.

If no connection could be established, void is returned.

Note that it's not possible to send/receive values of the type object as those are bound to the local script environment, all other values can be serialized and passed as arguments or received as return values.

This API should be a opt-in implementation that can be enabled via command line arguments.