added clean and clean-all to travis config
added clean and clean-all to travis config

iteratec/OpenSpeedMonitor,IteraSpeed/OpenSpeedMonitor,iteratec/OpenSpeedMonitor,IteraSpeed/OpenSpeedMonitor,IteraSpeed/OpenSpeedMonitor,iteratec/OpenSpeedMonitor,iteratec/OpenSpeedMonitor,iteratec/OpenSpeedMonitor