* lib/screenshooter-global.h: add a cli gboolean to the ScreenshotData

	  structure. Combined with the close member of the structure, this
	  allows to close the application or not depending on how the
	  executable is called.
	* src/main.c, lib/screenshooter-actions.{c,h}: move the dialog
	  stuff to (screenshooter_take_and_output_screenshot) which is
	  from now on a GSourceFunc. It returns TRUE if we want to take
	  another screenshot, else it quits the main loop and returns
	  FALSE. It is called via g_idle_add in (main), which allows us
	  to always have a main loop. The workaround consisting in
	  sleep (1) before taking a screenshot seems useless now.
	* lib/screenshooter-zimagez.c: don't start and exit a main
	  loop here, run the dialog instead of showing it.
	* panel-plugin/screenshooter-plugin.c: set the cli member of the
	  structure to false when initializing the plugin.


(Old svn revision: 7361)