Support for different versions

[Ricardo Lafuente]

Hi everyone,

We've set up support for multiple sites for a set of versions, and have 
a local version that loads the most recent 3 releases (from git tags). 
To finish this up, we'd just need to know what versions we should 
support (besides the "main" branch) -- these can be tags or branches. 
From there, we'll figure out the best way to define these, probably 
going with the JSON config idea pitched by Libor.

We'll write shortly with other quick improvements that we've made to the 
site. Still a few items in our TODO, but getting closer!

Have a great week,
a&r