- add the glib and stdlib headers.
	  - use RETURN_SUCCESS and RETURN_FAILURE instead of 0 and 1.
	* lib/exo-simple-job.{c,h}, lib/exo-job.{c,h}: take the job framework
	  from Exo written by Jannis Pohlmann. Thank you Jannis!
	* lib/screenshooter-job.{c,h}, lib/screenshooter-simple-job.{c,h}:
	  ScreenshooterJob is based on ExoJob, it provides to additional signals,
	  ask and image-uploaded.
	* lib/screenshooter-marshal.list: add some marshallers for the new
	  signals.
	* lib/screenshooter-zimagez.{c,h}: port the existing code to use a
	  ScreenshooterJob. Thanks to Jannis for his great help! This fixes
	  a bunch of problems that occured with the previous implementation.
	  The dialogs still need to be polished.
	* lib/screenshooter-actions.c: use the new function.
	* lib/Makefile.am:
	  - add some magic to generate the marshallers.
	  - sort the source files by alphabetical order.
	* configure.ac.in: bump the GThreads required version to 2.16.



(Old svn revision: 7340)