* edje: Add image set support.

	* edje: Add image set support.

	Ease support of Freedesktop multiple size image.

	Sample:
	-------

	images {
		..
	       	set {
			name: "image_name_used";
  			image {
				image: "500x500.png" LOSSY 90;
     				size: 201 201 500 500;
  			}
  			image {
				image: "200x200.png" COMP;
     				size: 51 51 200 200;
  			}
  			image {
				image: "50x50.png" COMP;
     				size: 11 11 50 50;
  			}
  			image {
				image: "10x10.png" COMP;
     				size: 0 0 10 10;
  			}
		}
		..
	}

git-svn-id: http://svn.enlightenment.org/svn/e/trunk/edje@49369 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33