Move ControlService tasks into EngineService

All ControlService was used for was a redirection to the engine service. This will be further split up in the future into more logical units of responsibility.

lib/service/control_service.dart

@@ -1,38 +0,0 @@
-import 'package:rules_of_living/service/engine_service.dart';
-
-class ControlService {
-  EngineService _es;
-
-  ControlService(this._es);
-
-  void run() {
-    _es.engine.running = true;
-  }
-
-  void stop() {
-    _es.engine.running = false;
-  }
-
-  void toggleRunning() {
-    _es.engine.running = !_es.engine.running;
-  }
-
-  void step() {
-    _es.engine.step();
-  }
-
-  void reset() {
-    _es.engine.reset();
-  }
-
-  void addRandomPattern() {
-    _es.engine.running = false;
-    _es.engine.addPattern();
-  }
-
-  void clear() {
-    _es.engine.clear();
-  }
-
-  bool get isRunning => _es.engine.running;
-}

lib/service/engine_service.dart

@@ -12,4 +12,35 @@ class EngineService {
     engine = newEngine;
     return newEngine;
   }
+
+  void run() {
+    engine.running = true;
+  }
+
+  void stop() {
+    engine.running = false;
+  }
+
+  void toggleRunning() {
+    engine.running = !engine.running;
+  }
+
+  void step() {
+    engine.step();
+  }
+
+  void reset() {
+    engine.reset();
+  }
+
+  void addRandomPattern() {
+    engine.running = false;
+    engine.addPattern();
+  }
+
+  void clear() {
+    engine.clear();
+  }
+
+  bool get isRunning => engine.running;
 }