Readme: Add fenced code blocks with langauage hints

README.md

@@ -79,6 +79,7 @@ connection state, and type of connection.
 
 ### Quick Example
 
+```js
 function checkConnection() {
     var networkState = navigator.connection.type;
 
@@ -96,7 +97,7 @@ connection state, and type of connection.
 }
 
 checkConnection();
-
+```
 
 ### API Change
 
@@ -158,12 +159,13 @@ attach an event listener once the `deviceready` event fires.
 
 ### Quick Example
 
+```js
 document.addEventListener("offline", onOffline, false);
 
 function onOffline() {
     // Handle the offline event
 }
-
+```
 
 ### iOS Quirks
 
@@ -197,12 +199,13 @@ attach an event listener once the `deviceready` event fires.
 
 ### Quick Example
 
+```js
 document.addEventListener("online", onOnline, false);
 
 function onOnline() {
     // Handle the online event
 }
-
+```
 
 ### iOS Quirks
 
@@ -227,7 +230,6 @@ To start with, create a new FileEntry object (data.txt) to use for sample data.
 >*Note* This code example requires the File plugin.
 
 ```js
-
 var dataFileEntry;
 
 function createSomeData() {