* lib/sexy-url-label.{c,h}: add the sexy_url_label taken from

	  libsexy.
	* lib/screenshooter-zimagez.{c,h}:
	  - add a link to ZimageZ so that users can create an account easily.
	  - add tooltips for the different entries.
	  - if one of the fiels is empty when the dialog is validated, show it
            again and ask the user to fill all the fields.
	  - plug some leaks and fix a double free issue.


(Old svn revision: 7312)