Fix es6 import for blueimp-md5.

blueimp-md5/blueimp-md5-tests.ts

@@ -1,4 +1,4 @@
-import * as md5 from "blueimp-md5";
+import md5 = require("blueimp-md5");
 
 function hash1(): string {
     return md5('hello world');

blueimp-md5/index.d.ts

@@ -4,5 +4,4 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare function md5(value: string, key?: string, raw?: boolean): string;
-declare namespace md5 { }
 export = md5;