Fix README Code Blocks

README.md

@@ -15,68 +15,73 @@ To use this on the server side please `require('qrcode');` =)
 Examples
 --------
 A simple server side test...
-
-    var QRCode = require('qrcode');
+```javascript
+var QRCode = require('qrcode');
     
-    QRCode.toDataURL('i am a pony!',function(err,url){
-        console.log(url);
-    });
-
+QRCode.toDataURL('i am a pony!',function(err,url){
+    console.log(url);
+});
+```
 
 In your terminal if you install globally...
 
+```shell
+qrcode "hi i want a qrcode"
 
-    qrcode "hi i want a qrcode"
-    
-    qrcode "i like to save qrs to file" qr.png
-
+qrcode "i like to save qrs to file" qr.png
+```
 
 In client side HTML...
 
+```html
+<!--[if ie]><script type="text/javascript" src="/vendors/excanvas/excanvas.js"></script><![endif]-->
+<script src="/build/qrcode.js"></script>
+<canvas id="test"></canvas>
+<script>
 
-    <!--[if ie]><script type="text/javascript" src="/vendors/excanvas/excanvas.js"></script><![endif]-->
-    <script src="/build/qrcode.js"></script>
-    <canvas id="test"></canvas>
-    <script>
-    
-    var qrcodedraw = new QRCodeLib.QRCodeDraw();
-    
-    qrcodedraw.draw(document.getElementById('test'),"this text will be in the code!", function(error,canvas){
-      if(error){
-         return console.log('Error =( ',error);
-      }
-      console.log('success!');
-    });
-    </script>
+var qrcodedraw = new QRCodeLib.QRCodeDraw();
 
+qrcodedraw.draw(document.getElementById('test'),"this text will be in the code!", function(error,canvas){
+  if(error){
+     return console.log('Error =( ',error);
+  }
+  console.log('success!');
+});
+</script>
+```
 
 Remember to put `excanvas.js` and `qrcode.js` somewhere where your browser can find them.
 
 Server Side API
 ---
-
-    QRCode.draw(text, [optional options], cb(error,canvas));
+```javascript
+QRCode.draw(text, [optional options], cb(error,canvas));
+```
 Returns a node canvas object see https://github.com/LearnBoost/node-canvas for all of the cool node things you can do. Look up the canvas api for the other cool things.
-    
-    QRCode.toDataURL(text, [optional options], cb(error,dataURL));
+```javascript
+QRCode.toDataURL(text, [optional options], cb(error,dataURL));
+```
 Returns mime image/png data url for the 2d barcode.
-    
-    QRCode.save(path, text, [optional options] , cb(error,written));
+```javascript
+QRCode.save(path, text, [optional options] , cb(error,written));
+```
 Saves png to the path specified returns bytes written.
-    
-    QRCode.drawText(text, [optional options],cb)
+```javascript    
+QRCode.drawText(text, [optional options],cb)
+```
 Returns an ascii representation of the qrcode using unicode characters and ansi control codes for background control.
-    
-    QRCode.drawBitArray(text, [optional options], cb(error,bits,width));
+ ```javascript   
+QRCode.drawBitArray(text, [optional options], cb(error,bits,width));
+```
 Returns an array with each value being either 0 light or 1 dark and the width of each row.
 This is enough info to render a qrcode any way you want. =)
 
 
 Options
 ---------
-
-    errorCorrectLevel
-
+```javascript
+errorCorrectLevel
+```
 Can be one of the values in `qrcode.errorCorrectLevel`.
 Can be a string. one of `"minimum","medium","high","max"`.
 If `undefined`, defaults to H which is max error correction.
@@ -84,20 +89,20 @@ If invalid value, defaults to minimum error correction.
 
 client side api
 ---------------
-
-    window.qrcodelib
-
+```javascript
+window.qrcodelib
+```
 `qrcodelib.qrcodedraw()` Constructor
-
-    qrcode = new qrcodelib.qrcodedraw()
-    qrcode.draw(canvasElement,text,[optional options],cb);
-
+```javascript
+qrcode = new qrcodelib.qrcodedraw()
+qrcode.draw(canvasElement,text,[optional options],cb);
+```
 
 For quick client side use...
-
-    node test/clientsideserver.js
-    open http://localhost:3031
-
+```shell
+node test/clientsideserver.js
+open http://localhost:3031
+```
 The JavaScript is in `test/clientside.html`.
 
 QR code capacity
@@ -114,7 +119,7 @@ The default is H.
 
 please note as pointed out by @giacecco that byte length is often greater than string length due to multibyte characters.
 
-```js
+```javascript
 // so use the byte length
 (new Buffer(str)).length
 
@@ -127,25 +132,28 @@ the default module size cannot be changed through the public api at this time.
 
 Installation
 --
-
-    npm install qrcode
+```shell
+npm install qrcode
+```
 To use qrcode from the command line to save  qrcode images or generate ones you can view in your terminal...
-
-    npm install -g qrcode 
+```shell
+npm install -g qrcode
+```
 `node-canvas` is a native module and requires dev packages of `cairo` and `pixman` to compile. 
  On ubuntu you can install them with `apt-get` and `npm install` will work great.
   
-
-    sudo apt-get install libpixman-1-dev libcairo2-dev
+```shell
+sudo apt-get install libpixman-1-dev libcairo2-dev
+```
 It is my higest priority for this module to use an all `js` png encoder and remove this dep.
 
 
 Dependencies
 ------------
 These should be taken care of for you by npm but you should...
-
-    npm install canvas
-
+```shell
+npm install canvas
+```
 If `cairo` gives you trouble and you cannot install `canvas`, checkout the canvas site. I know @tjholowaychuk has setup a way to download and install a version of cairo/pixman for testing.
 
 The word "QR Code" is registered trademark of: