fix(router): add baseUrl to relative paths, but not absolute.

Closes angular#1783

Author: rkirov

modules/angular2/src/router/location.js

@@ -35,8 +35,8 @@ export class Location {
   }
 
   go(url:string) {
-    url = this._stripBaseHref(url);
-    this._browserLocation.pushState(null, '', url);
+    var finalUrl = url[0] == '/' ? url : this._baseHref + '/' + url;
+    this._browserLocation.pushState(null, '', finalUrl);
   }
 
   forward() {

modules/angular2/test/router/location_spec.js

@@ -25,16 +25,21 @@ export function main() {
       location = new Location(browserLocation);
     });
 
-    it('should normalize urls on navigate', () => {
+    it('should normalize relative urls on navigate', () => {
+      location.go('user/btford');
+      expect(browserLocation.spy('pushState')).toHaveBeenCalledWith(null, '', '/my/app/user/btford');
+    });
+
+    it('should not append urls with leading slash on navigate', () => {
       location.go('/my/app/user/btford');
-      expect(browserLocation.spy('pushState')).toHaveBeenCalledWith(null, '', '/user/btford');
+      expect(browserLocation.spy('pushState')).toHaveBeenCalledWith(null, '', '/my/app/user/btford');
     });
 
     it('should remove index.html from base href', () => {
       browserLocation.baseHref = '/my/app/index.html';
       location = new Location(browserLocation);
-      location.go('/my/app/user/btford');
-      expect(browserLocation.spy('pushState')).toHaveBeenCalledWith(null, '', '/user/btford');
+      location.go('user/btford');
+      expect(browserLocation.spy('pushState')).toHaveBeenCalledWith(null, '', '/my/app/user/btford');
     });
 
     it('should normalize urls on popstate', inject([AsyncTestCompleter], (async) => {