removed System.out.printlns previously used for debugging.
The user may now set the beacon announce interval (time in seconds between two
beacons being sent out) in the network preferences. See Issue #36.
removed unused System.out.println I used to test the beacon announce interval.
Added System.out.println to be able to retrace an IllegalArgumentException
I can't yet reproduce that sometimes occurs while doing stuff with the
moduleCombo in DeployView.