Move App HTML into Separate Template

lib/app_component.dart

@@ -5,19 +5,6 @@ import 'package:rules_of_living/src/App.dart';
 
 @Component(
   selector: 'my-app',
-  template: '''
-  <h1>Cellular Automata - The Rules of Life</h1>
-  <div id="output">
-      <canvas #caCanvas width="500" height="500"></canvas>
-  </div>
-  <div id="controls">
-      <button id="run">Run</button>
-      <button id="step">Step</button>
-      <button id="reset">Reset</button>
-      <button id="random">Random</button>
-      <input id="speed" title="Speed" value="1">
-  </div>
-  ''',
 )
 class AppComponent implements OnInit {
   var name = "World";