Fix module export and update readme

Author: Stefan Buck

README.md

@@ -7,35 +7,16 @@
 
 GitHub.com is a huge web app with millions of visitors every day. To reduce the serve load, some parts are build as a single page app. This means, not every click results in a page reload. This is a big problem for some extension scenarios.
 
-The Github-Injection registers a listener to the dom which detects dom changes. If a significant dom node changed his content, the callback will be executed and you can reinitialize your extension. For simplicity the callback is also executed on the first script execution.
-
-A sample implementation can be found in the [Octo-Linker-Core](https://github.com/octo-linker/core/blob/4a30c6606465e294d1ae1c9ca394ba03368928f7/index.js#L8-L10) package.
+GitHub.com uses [pjax](https://github.com/defunkt/jquery-pjax) which fires an event after replacing the requested page with the previous one. GitHub-inject will invoke the provided callback when `pjax:end` is dispatched and you can reinitialize your extension. For simplicity the callback is also executed on the first script execution.
 
 ## Install
 
-Bower
-```bash
-$ bower install --save github-injection
-```
-
-Node
 ```bash
 $ npm install --save github-injection
 ```
 
 ## Usage
 
-### Browser
-```js
-gitHubInjection(() => {
-  const el = window.document.getElementsByClassName('header')[0];
-  const randomColor = '#' + ((1<<24) * Math.random()|0).toString(16);
-  el.style.backgroundColor = randomColor;
-});
-
-```
-
-### Node
 ```js
 const gitHubInjection = require('github-injection');
 
@@ -44,7 +25,6 @@ gitHubInjection(() => {
   const randomColor = '#' + ((1<<24) * Math.random()|0).toString(16);
   el.style.backgroundColor = randomColor;
 });
-
 ```
 
 

index.js

@@ -16,5 +16,5 @@ const gitHubInjection = cb => {
 // Export the gitHubInjection function for **Node.js**
 // Otherwise leave it as a global
 if (typeof exports !== 'undefined') {
-  exports.gitHubInjection = gitHubInjection;
+  exports = module.exports = gitHubInjection;
 }