Using let instead of var and relative template path

ref #17

demo-shell-ng2/app/components/login.ts

@@ -5,9 +5,10 @@ import {Authentication} from '../services/authentication';
 
 @Component({
     selector: 'login',
+    moduleId: 'app/components/login',
     directives: [ROUTER_DIRECTIVES, FORM_DIRECTIVES],
-    templateUrl: 'app/template/login.component.html',
-    styleUrls: ['app/style/login.component.css'],
+    templateUrl: 'login.component.html',
+    styleUrls: ['login.component.css'],
 })
 export class Login {
     form:ControlGroup;
@@ -29,7 +30,9 @@ export class Login {
     }
 
     onSubmit(value:any, event) {
-        event.preventDefault();
+        if (event) {
+            event.preventDefault();
+        }
         this.auth.login('POST', value.username, value.password)
             .subscribe(
                 (token:any) => this.router.navigate(['Home']),

demo-shell-ng2/app/services/authentication.ts

@@ -2,7 +2,7 @@ import {Injectable} from 'angular2/core';
 import {Observable} from 'rxjs/Rx';
 import {Http, Headers, URLSearchParams, Response} from 'angular2/http';
 
-declare var xml2json:any;
+declare let xml2json:any;
 
 @Injectable()
 export class Authentication {