Today's the day for a big update! concrete5 8.0.3 is now available, as is 22.214.171.124. 126.96.36.199 is a tiny maintenance release – we broke Environment Information again in the last update (sorry!) and this fixes it. 8.0.3 is fixes a number of bugs in 8.0 and is highly recommended for those running 8.0. Check it out!
You can download 8.0.3 and 188.8.131.52 from the downloads page.
Additionally, we some more great news: we have a completely new developer documentation section ready for your perusal. This section is about concrete5's custom attribute system, and specifically how to build attributes for version 8.
There's a lot of detail in there, including articles about how to build custom attribute types, extend core attribute types, add attribute keys programmatically, handle attribute value responses, build attribute categories and more. (Important: some of these examples won't work unless you're running 8.0.3, so grab that upgrade.)