[ReactNative] Sort React Native exports into two groups, Components and ...

Summary:
...APIs

This maps the way the docs are structured, this is easier to figure out when the docs are stale
Closes https://github.com/facebook/react-native/pull/161
Github Author: Christopher Chedeau <vjeux@fb.com>

Test Plan: Imported from GitHub, without a `Test Plan:` line.

Libraries/react-native/react-native.js

@@ -7,7 +7,30 @@
 
 var ReactNative = {
   ...require('React'),
+
+  // Components
   ActivityIndicatorIOS: require('ActivityIndicatorIOS'),
+  DatePickerIOS: require('DatePickerIOS'),
+  ExpandingText: require('ExpandingText'),
+  Image: require('Image'),
+  ListView: require('ListView'),
+  ListViewDataSource: require('ListViewDataSource'),
+  MapView: require('MapView'),
+  NavigatorIOS: require('NavigatorIOS'),
+  PickerIOS: require('PickerIOS'),
+  ScrollView: require('ScrollView'),
+  SliderIOS: require('SliderIOS'),
+  SwitchIOS: require('SwitchIOS'),
+  TabBarIOS: require('TabBarIOS'),
+  Text: require('Text'),
+  TextInput: require('TextInput'),
+  TouchableHighlight: require('TouchableHighlight'),
+  TouchableOpacity: require('TouchableOpacity'),
+  TouchableWithoutFeedback: require('TouchableWithoutFeedback'),
+  View: require('View'),
+  WebView: require('WebView'),
+
+  // APIs
   AlertIOS: require('AlertIOS'),
   Animation: require('Animation'),
   AppRegistry: require('AppRegistry'),
@@ -15,32 +38,15 @@ var ReactNative = {
   AppStateIOS: require('AppStateIOS'),
   AsyncStorage: require('AsyncStorage'),
   CameraRoll: require('CameraRoll'),
-  DatePickerIOS: require('DatePickerIOS'),
-  ExpandingText: require('ExpandingText'),
-  Image: require('Image'),
   InteractionManager: require('InteractionManager'),
   LayoutAnimation: require('LayoutAnimation'),
-  ListView: require('ListView'),
-  ListViewDataSource: require('ListViewDataSource'),
-  MapView: require('MapView'),
-  NavigatorIOS: require('NavigatorIOS'),
   NetInfo: require('NetInfo'),
-  PickerIOS: require('PickerIOS'),
   PixelRatio: require('PixelRatio'),
-  ScrollView: require('ScrollView'),
-  SliderIOS: require('SliderIOS'),
   StatusBarIOS: require('StatusBarIOS'),
   StyleSheet: require('StyleSheet'),
-  SwitchIOS: require('SwitchIOS'),
-  Text: require('Text'),
-  TextInput: require('TextInput'),
   TimerMixin: require('TimerMixin'),
-  TouchableHighlight: require('TouchableHighlight'),
-  TouchableOpacity: require('TouchableOpacity'),
-  TouchableWithoutFeedback: require('TouchableWithoutFeedback'),
   VibrationIOS: require('VibrationIOS'),
-  View: require('View'),
-  WebView: require('WebView'),
+
   invariant: require('invariant'),
   ix: require('ix'),
 };