Alpha v.2.1
Commit - New service ConnectivityMonitorService added
Alpha 2.1a
commit - Edit on MainActivity for Connectivity Monitor Service
Merge commit 'fab955cc497627029d318961def5f459913c65a8'
Merge commit 'cce82648671eac91f265449ea124349464608e1b'

Conflicts:
	MSRA_MonitorTestApp/app/src/main/java/kr/ac/yonsei/winet/msra_monitortestapp/MainActivity.java
	MSRA_MonitorTestApp/app/src/main/java/kr/ac/yonsei/winet/msra_monitortestapp/TrafficMonitor/ConnectivityHelper.java
Urgent errors are corrected.