Added experimental version of a Socket API with SSL support.

* Each class has a Socket() method to retrieve the underlaying file descriptor
to be able to do the more advanced stuff, if necessary.
* A server socket is yet missing, but the rest is pretty much covered.

Added experimental version of a Socket API with SSL support.

* Each class has a Socket() method to retrieve the underlaying file descriptor
to be able to do the more advanced stuff, if necessary.
* A server socket is yet missing, but the rest is pretty much covered.