The previous documentation downloads on Codeplex as indicated are gone … 

On the updated site, you will find a new documentation package, which represents the new “look and feel” of the documentation which is included with the product installation. 
 

Unzip the package and select index.htm in the readiness package directory, which will give you this view and a consolidated product documentation, guidance and readiness package. 

Note the red BETA … it is still work in progress :)