added support for popToRoot, setTitle, testID

example/src/screens/PushedScreen.js

           <Text style={styles.button}>Pop Screen</Text>
         </TouchableOpacity>
 
+        <TouchableOpacity onPress={ this.onPopToRootPress.bind(this) }>
+          <Text style={styles.button}>Pop To Root</Text>
+        </TouchableOpacity>
+
       </View>
     );
   }
   onPopPress() {
     this.navigator.pop();
   }
+  onPopToRootPress() {
+    this.navigator.popToRoot();
+  }
 }
 
 const styles = StyleSheet.create({

example/src/screens/SecondTabScreen.js

           <Text style={styles.button}>Change Buttons</Text>
         </TouchableOpacity>
 
+        <TouchableOpacity onPress={ this.onChangeTitlePress.bind(this) }>
+          <Text style={styles.button}>Change Title</Text>
+        </TouchableOpacity>
+
       </View>
     );
   }
+  onChangeTitlePress() {
+    this.navigator.setTitle({
+      title: Math.round(Math.random() * 100000).toString()
+    });
+  }
   onChangeButtonsPress() {
     let buttons;
     if (this.buttonsCounter % 3 == 0) {

example/src/screens/StyledScreen.js

   static navigatorButtons = {
     rightButtons: [{
       icon: require('../../img/navicon_edit.png'),
-      id: 'compose'
+      id: 'compose',
+      testID: 'e2e_is_awesome'
     }]
   };
   constructor(props) {

package.json

     "react-native": ">=0.19.0"
   },
   "dependencies": {
-    "react-native-controllers": "^1.2.1"
+    "react-native-controllers": "^1.2.2"
   }
 }

src/Screen.js

   pop(params = {}) {
     return platformSpecific.navigatorPop(this, params);
   }
+  popToRoot(params = {}) {
+    return platformSpecific.navigatorPopToRoot(this, params);
+  }
   showModal(params = {}) {
     return Navigation.showModal(params);
   }
     const navigatorEventID = this.screenInstance.listenOnNavigatorEvents();
     return platformSpecific.navigatorSetButtons(this, navigatorEventID, params);
   }
+  setTitle(params = {}) {
+    return platformSpecific.navigatorSetTitle(this, params);
+  }
 }
 
 export default class Screen extends Component {

src/platformSpecific.ios.js

   });
 }
 
+function navigatorPopToRoot(navigator, params) {
+  Controllers.NavigationControllerIOS(navigator.navigatorID).popToRoot({
+    animated: params.animated
+  });
+}
+
+function navigatorSetTitle(navigator, params) {
+  Controllers.NavigationControllerIOS(navigator.navigatorID).setTitle({
+    title: params.title
+  });
+}
+
 function navigatorSetButtons(navigator, navigatorEventID, params) {
   if (params.leftButtons) {
     const buttons = params.leftButtons.slice(); // clone
   startSingleScreenApp,
   navigatorPush,
   navigatorPop,
+  navigatorPopToRoot,
   showModal,
   dismissModal,
-  navigatorSetButtons
+  navigatorSetButtons,
+  navigatorSetTitle
 }