First of all, a
Great Job 
indeed, from me too.
I've added Airio to the [noobs] servers and we were just now checking it out. It's fantastic. And you have made it extremely straightforward and well-documented to set it up, I've been amazed at the quality.
I posted the tip about Debian/Ubuntu because it's a very common server distro. I didn't know anything about C# or Mono and found that I needed the aforementioned libraries / packages by trial and error (because the mono-runtime package does not have Core and System as dependencies). You could add this to the manual as a hint, with a wording like this:
"Airio can be installed in a Linux or other Un*x system, with the requirement of the Mono 2.0 runtime. For instance, in a Debian-based distribution (such as Ubuntu), you need to install at minimum the packages: mono-runtime, libmono-corlib2.0-cil, libmono-system2.0-cil."