Readme: Add fenced code blocks with langauage hints

README.md

@@ -79,7 +79,8 @@ connection state, and type of connection.
 
 ### Quick Example
 
-    function checkConnection() {
+```js
+function checkConnection() {
     var networkState = navigator.connection.type;
 
     var states = {};
@@ -93,10 +94,10 @@ connection state, and type of connection.
     states[Connection.NONE]     = 'No network connection';
 
     alert('Connection type: ' + states[networkState]);
-    }
+}
-
-    checkConnection();
 
+checkConnection();
+```
 
 ### API Change
 
@@ -158,12 +159,13 @@ attach an event listener once the `deviceready` event fires.
 
 ### Quick Example
 
-    document.addEventListener("offline", onOffline, false);
+```js
+document.addEventListener("offline", onOffline, false);
 
-    function onOffline() {
+function onOffline() {
     // Handle the offline event
-    }
+}
-
+```
 
 ### iOS Quirks
 
@@ -197,12 +199,13 @@ attach an event listener once the `deviceready` event fires.
 
 ### Quick Example
 
-    document.addEventListener("online", onOnline, false);
+```js
+document.addEventListener("online", onOnline, false);
 
-    function onOnline() {
+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() {