Added : hostname in addition of ip address for computers
Fixed : power_on (WOL) for computers, now computing the broadcast address
Modified : redirect to computers list after power_on/power_off
Modified computer show view
Added power status refresh actions in computers controller
Fixed : computer.update_power_status, forgot to save the result in db, now done
Added : netmask in computer show view
Modified : Computer show view, added bootstrap panels
Added : computers pagination in index view
Added : User auth + signup with devise