Merge pull request #3901 from trystanclarke/master

Add fitToContent method to Paper class in joint.d.ts

jointjs/jointjs.d.ts

@@ -78,6 +78,7 @@ declare module joint {
             findViewByModel(modelOrId:any):CellView;
             findViewsFromPoint(p:{ x: number; y: number; }):CellView[];
             findViewsInArea(r:{ x: number; y: number; width: number; height: number; }):CellView[];
+            fitToContent(opt?:any): void;
         }
 
         class ElementView extends CellView {