referenceable types throughout node and express

All node modules and classes can be referenced by type name. External
module support remains unchanged, but now static type information is
available for all node modules and types without needing to go through
the external module definitions.

Similar for express.

express/express.d.ts

@@ -12,8 +12,10 @@
 
 /// <reference path="../node/node.d.ts" />
 
-declare module "express" { export = ExpressStatic; }
-declare function ExpressStatic(): ExpressStatic.Express
+declare module "express" { var _: ExpressStatic; export = _; }
+interface ExpressStatic{
+    (): ExpressStatic.Express
+}
 declare module ExpressStatic {
 
         export interface IRoute {
@@ -546,7 +548,7 @@ declare module ExpressStatic {
             (body: any): Response;
         }
 
-        export interface Response extends NodeHttp.ServerResponse {
+        export interface Response extends NodeJs.Http.ServerResponse {
             /**
              * Set status `code`.
              *