Add JSDOC Preview

@jmeas brought up a good point in channel that we've heard from almost everyone working on the api @joshbedo, @jdaudier, @moimikey... It's not obvious how to preview the api on the website! 

This is crazy because unless you can see how it looks, it's hard to see if the documentation you just wrote is right.
Just in case someone has an issue with the process, maybe you should drop the 'It is easy...' bit.