commit socket.io version
LongPolling added
- PollingService.class is for handling foreground notification only.
separated services
- one for polling with server-side (long polling) and getting system clipboard
- another for Shortcut foreground notification that handled by user from setting.xml
fixed database nullPointerException
handling network connectivity
fixed network connectivity problem that calls several callbacks
added sending ping log on eclipse console and interrupt() function called when the main activity going to onDestroy() or onPause()

what happend
pingpong test added

what happend
added local variable to handle while loop on ping thread. it will be interrupted when life cycle of Activity is going to onPause() or onDestroy() otherwise it's alive
check email empty when requesting long-polling
fixed NullPointerException when requesting long-polling
- the reason was that preferences was not initiated
CONNECTED_COUNT now added on MainActivity of onResume() method
-to avoid defect of counting it
improved algorithm to compare feeds whether the clip is new, changed or deleted
optimization for duplicating reqeust-longpoll
randomly over-write existed feed fixed
- randomly the static string AppClip is cleared as empty so that now changed static variable to store session value