Added file select option for raster images in server_open extension. Also added Uploading file dialog box for server-based uploads

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@1624 eee81c28-f429-11dd-99c0-75d572ba1ddd

editor/svgcanvas.js

@@ -7496,6 +7496,11 @@ this.embedImage = function(val, callback) {
 	}).attr('src',val);
 }
 
+// Function: setGoodImage
+// Sets a given URL to be a "last good image" URL
+this.setGoodImage = function(val) {
+	last_good_img_url = val;
+}
 
 this.open = function() {
 	// Nothing by default, handled by optional widget/extension