Merge pull request #2989 from jtlan/classed-object-arg

Add Selection.classed(object) to d3.d.ts

d3/d3.d.ts

@@ -719,6 +719,7 @@ declare module D3 {
             (name: string): string;
             (name: string, value: any): Selection;
             (name: string, valueFunction: (data: any, index: number) => any): Selection;
+            (classValueMap: Object): Selection;
         };
 
         style: {