Adding add task functionnality: without personalisation right now.

src/app/tasks/tasks.component.html

@@ -2,7 +2,7 @@
   <header>
     <h2>{{ user.name }}'s Tasks</h2>
     <menu>
-      <button>Add Task</button>
+      <button (click)="onAddTask()">Add Task</button>
     </menu>
   </header>
 
@@ -12,7 +12,7 @@
         <li>
           <app-task
             [task]="task"
-            (complete)="onDeleteTask($event)"
+            (complete)="onCompleteTask($event)"
           />
         </li>
       }