Support for all resources types

Hello,

I am using enml-js to convert ENML into HTML to display notes content in the browser.
Your project saved me lot of time, thank you for that!

I wanted to include all types of resources in my notes, as on Evernote web application, so I forked your project.
Now you can embed audio and video in the note content (using the <audio> and <video> HTML5 tags). For other resource types, you have a link to the source url to download it.
I added the option to give resource titles to HTMLOfENML to display resources title in the HTML code (title attribute or link text).

I also reformatted some code, not to have syntaxic errors highlighted in my text editor :-)

I hope this patch will be useful, it would be great if you could update your module on npmjs.org!

Thanks.

--
Julien