In GogoCtl methods: replaced calls to showToast with Log.d, user doesn't
really need to see those.
Added thread to monitor connection status

It ends itself if gogoc is stopped
Added offline icons
Add notification

Also try to fix thread re-invocation (in progress)
Fixed monitorConnection thread re-invocation problem

Create new thread after startGogoc call.
Update TODO list
Cancel notification in stopGogoc method