First, let us start by letting you know that multisignature and pay to script hash transactions support has been added to mainnet as well quite some time now.
Secondly, we have moved all our documentation from PDF format to online format which you can find here. It includes both the documentation for the REST API and the Websockets API (will come to that in a second) and this is what you should be using as a reference from now on. In other words, get rid of the PDF!
Our important update however is that we have released our Websockets API which you can now freely use. As you have probably already noticed we have implemented it in a couple of areas of the website as well, like the home page, the blocks page and the addresses page.
We have already been working on our wallet and notifications system. More updates about them soon!
Thank you all for your support so far and as always, feedback is always welcome :)