So we are overhauling the EnergyPlus documentation for this (8.3) release. The docs are going to be hosted on the upcoming energyplus.net website for EnergyPlus, there is just a slight delay in getting everything all set up. If you'd like a sneak peek, including a few rough edges, check them out for now at nrel.github.io/EnergyPlus. In the long run, this location will hold the current ("daily") documentation, so that won't be a great resource for most users. The energyplus.net/documentation will be the place to check out the documentation for the last major release.
Update: We are going to be working on search, and we will also be adding "download as pdf" functionality, though it's not available now.
Update 2: The docs should now be live at energyplus.net/documentation. As I mentioned above, there are a few rough edges still, but they are being actively worked on already. Thanks!