Use the function wrapper format instead of the decorator format for API examples

Author: Richard Hua

README.md

@@ -735,16 +735,16 @@ This decorator provides support for letting you customize its behaviour to easil
     // Fully silent update which keeps the app in
     // sync with the server, without ever
     // interrupting the end user
-    @codePush()
     class MyApp extends Component {}
+    codePush()(MyApp);
     ```
 
 2. **Silent sync everytime the app resumes**. Same as 1, except we check for updates, or apply an update if one exists every time the app returns to the foreground after being "backgrounded".
 
     ```javascript
     // Sync for updates everytime the app resumes.
-    @codePush({ checkFrequency: codePush.CheckFrequency.ON_APP_RESUME, installMode: codePush.InstallMode.ON_NEXT_RESUME })
     class MyApp extends Component {}
+    codePush({ checkFrequency: codePush.CheckFrequency.ON_APP_RESUME, installMode: codePush.InstallMode.ON_NEXT_RESUME })(MyApp);
     ```
 
 3. **Interactive**. When an update is available, prompt the end user for permission before downloading it, and then immediately apply the update. If an update was released using the `mandatory` flag, the end user would still be notified about the update, but they wouldn't have the choice to ignore it.
@@ -753,16 +753,15 @@ This decorator provides support for letting you customize its behaviour to easil
     // Active update, which lets the end user know
     // about each update, and displays it to them
     // immediately after downloading it
-    @codePush({ updateDialog: true, installMode: codePush.InstallMode.IMMEDIATE })
     class MyApp extends Component {}
+    codePush({ updateDialog: true, installMode: codePush.InstallMode.IMMEDIATE })(MyApp);
     ```
 
 4. **Log/display progress**. While the app is syncing with the server for updates, make use of the `codePushStatusDidChange` and/or `codePushDownloadDidProgress` event hooks to log down the different stages of this process, or even display a progress bar to the user.
 
     ```javascript
     // Make use of the event hooks to keep track of
     // the different stages of the sync process.
-    @codePush()
     class MyApp extends Component {
         codePushStatusDidChange(status) {
             switch(syncStatus) {
@@ -788,6 +787,7 @@ This decorator provides support for letting you customize its behaviour to easil
             console.log(progess.receivedBytes + " of " + progress.totalBytes + " received.");
         }
     }
+    codePush()(MyApp);
     ```
 
 ##### CodePushOptions