* src/tracker-applet/tracker-applet.c: (set_status_hint),
	(can_auto_pause), (index_state_changed): Added new state (PAUSED)
	and add to the tooltip when paused so it is known that it can also
	be because of heave disk IO OR low disk space. Also uncommented
	the code for the tooltip when we are paused due to low battery.

	* src/tracker-indexer/tracker-indexer.c: Make low disk space
	warning a g_message() instead. Also added a state_to_string()
	function so we can see state changes a bit more clearly in the
	logs.

	* src/trackerd/tracker-daemon.c:
	* src/trackerd/tracker-dbus.c:
	* src/trackerd/tracker-main.c: 
	* src/trackerd/tracker-monitor.c:
	* src/trackerd/tracker-processor.c:
	* src/trackerd/tracker-status.[ch]: Moved all indexer state
	monitoring (paused/continued) to the tracker-status module. Now
	when we use APIs like tracker_status_set_is_paused_manually() it
	will now: 
	  - Tell the indexer to pause/continue
	  - Signal the applet that we are in a new state
	  - Set the state internally.

svn path=/trunk/; revision=2884