Bring back CSS/JS IPS4 Framework Documentation

[Tom Christian]

A few months ago during the alpha testing on the IPS4 preview site there was an excellent documentation section that provided really helpful information about the CSS & JS framework in IPS4. Please could this be updated and restored on this site?

Up until now, I've managed okay without it. However, I just discovered a feature in IPS4 that can be enabled by a single data-attribute in the HTML. This feature in particular is something I spent a couple of days building & testing in my own theme framework. If I had documentation on the framework this could have been avoided. 

I'm aware there's an old IP.Content export with this data floating around somewhere but I'm suggesting that an official section be added to this site.

Thanks.

[TSP]

And also a hosted PHPDoc-section for the 4.X code please