fix(router): fix for leading slash in dart

Using string1 === string2 translates to identical(string1, string2) in
dart, which is incorrect as it is possilbe for dart strings to have
different reference.

Author: rkirov

modules/angular2/src/router/route_recognizer.js

@@ -43,7 +43,7 @@ export class RouteRecognizer {
         StringMapWrapper.set(solution, 'params', pathRecognizer.parseParams(url));
 
         //TODO(btford): determine a good generic way to deal with terminal matches
-        if (url === '/') {
+        if (url == '/') {
           StringMapWrapper.set(solution, 'matchedUrl', '/');
           StringMapWrapper.set(solution, 'unmatchedUrl', '');
         } else {

modules/angular2/test/router/route_recognizer_spec.js

@@ -30,6 +30,17 @@ export function main() {
       });
     });
 
+    it('should work with leading slash', () => {
+      recognizer.addConfig('/', handler);
+
+      expect(recognizer.recognize('/')[0]).toEqual({
+        'handler': { 'components': { 'a': 'b' } },
+        'params': {},
+        'matchedUrl': '/',
+        'unmatchedUrl': ''
+      });
+    });
+
     it('should work with a dynamic segment', () => {
       recognizer.addConfig('/user/:name', handler);
       expect(recognizer.recognize('/user/brian')[0]).toEqual({