Adding utils.async([func]) as alias Q.async([func])();
Big refactoring in agent.vm:
  - conf_networking split in: config_nat_interface and config_net_interfaces.
  - config_nat_interface is called every time vm is started
  - ssh command can be stopped
  - configureIp forcing a timeout
Adding stop vm in agent.server routines.
The spec helper: dustman, now more simple to disable remove routines.