saveConf gets config from shared preferenes

* Remove saveConf(String conf) from GogoService interface
* saveConf() is called at each startGogoc() call
  TODO: a sharedPreferences listener should be implemented instead.
Changed EditText views to TextView

* Cleaned up main layout XML
Register broadcast receiver in onContentChanged method
Sent refreshUI intent for any connection status change
Note fixes/enhancements needed for connection monitoring thread