more documentation tweaks

Author: John Doherty

README.MD

@@ -29,11 +29,14 @@ app.get('/', function(req, res){
     // respond to this request with our fake-new content embedded within the BBC News home page
     res.merge('fake-news', {
        sourceUrl: 'http://www.bbc.co.uk/news',                              // external url to fetch
-       sourcePlaceholder: 'div[data-entityid="container-top-stories#1"]'    // css selector to inject our content into
+       sourcePlaceholder: 'div[data-entityid="container-top-stories#1"]',   // css selector to inject our content into
+       transform: null                                                      // pass function here to intercept the transofrm html prior to merging
     });
 });
 ```
 
+If you pass a function as the transform property ```transform: function($, model) {}``` - the function will be called prior to rendering, allowing you to inject title tags or html attributes.
+
 ## fake-news html
 
 ```html

lib/node-iframe-replacement.js

@@ -69,8 +69,8 @@ module.exports = function(req, res, next){
 }
 
 /**
- * Converts template url to $ object 
- * @param {string} sourceUrl - url to external template or html content
+ * Converts source url to $ object 
+ * @param {string} sourceUrl - url to external html content
  */
 function resolveTemplate(sourceUrl){