First scratch from old NetControl.

New things added:
1) Makefile to run code and unit tests. For the latter, a virtual
environment is being implemented, so this way we'll have a controlled
sub-network with the device 6.6.6.0 up, and the devices 6.6.6.[1-15] down.

2) Minor refactoring of the code. There's still more to do before adding
more functionality.