Added chrome app instructions for loading serialization

You cant develop montage apps in a chrome extension without knowing how to load the serialization with out a script tag. 

This is a show stopper with a quick fix for devs who build chrome apps, or who are used to using chrome extensions to debug client side apps. 

* chrome content security policy will not execute inline script tags: http://developer.chrome.com/extensions/contentSecurityPolicy.html#JSExecution

more refs: 
* recommended frameworks which support csp:  http://developer.chrome.com/apps/app_frameworks.html#recommended
* other frameworks which support chrome csp: https://groups.google.com/a/chromium.org/forum/#!topic/chromium-extensions/Wyer5m3Y4tQ,  https://github.com/cesine/todomvc-for-chrome-extensions/issues?labels=&milestone=&page=1&state=closed