added necessary code to start intentService
Checking for network state.

because, you wouldn't want to connect to the internet if you can't connect to the internet.
pollService checks for new results based on id of current results.
added AlarmManager

code in PhotoGalleryFragment is just test code to start alarmService.
now we can turn the alarm on and off.
alarm can now be toggled in options menu.
menu now toggles to reflect the state of the polling service.