Created Reported problem activity.
Added sending email as send feedback.
(Should try bug report since it's more beautiful after putting on market)
Added check network status.
Show hint if no network in ProblemListActivity.
Periodically check server.
Merge branch 'SendFeedback'

Conflicts:
	res/menu/activity_main.xml
	res/values/strings.xml
	src/edu/ntu/csie/agent/sweetreward/MainActivity.java
Merge branch 'NetworkConnection'

Conflicts:
	AndroidManifest.xml
	src/edu/ntu/csie/agent/sweetreward/ServerConnection.java
Added No Network Notification in ReportProblemAcitivty.