The function to read file is added to the class "FileManager"
commit
Merge branch 'Delay'
commit - delay not working
Merge branch 'Delay'
NetTask class is implemented.
commit - ping working
update1
Merge commit '142b21b253875f8212018c313d5eba9acd8d8006'

Conflicts:
	MSRA_MonitorTestApp/app/src/main/java/kr/ac/yonsei/winet/msra_monitortestapp/TrafficMonitor/ConnectivityHelper.java