Update mobile login page

mobile/src/screens/Home.js

@@ -0,0 +1,44 @@
+import React from 'react';
+import { StyleSheet, Text, View } from 'react-native';
+
+export class Home extends React.Component {
+  constructor(props) {
+    super(props);
+    this.props.navigator.setOnNavigatorEvent(this.onNavigatorEvent.bind(this));
+  }
+
+  onNavigatorEvent(event) {
+    switch(event.id) {
+      case 'willAppear':
+       break;
+      case 'didAppear':
+        this.props.navigator.showModal({ screen: 'app.Login' })
+        break;
+      case 'willDisappear':
+        break;
+      case 'didDisappear':
+        break;
+      case 'willCommitPreview':
+        break;
+    }
+  }
+
+  render() {
+    return (
+      <View style={styles.container}>
+        <Text>Hello John</Text>
+        <Text>Changes you make will automatically reload.</Text>
+        <Text>Shake your phone to open the developer menu.</Text>
+      </View>
+    );
+  }
+}
+
+const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    backgroundColor: '#fff',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+});