I don't object merging Linux into appveyor.yml somehow, but I really
don't have the time to figure out how to do it.
I also fear that Linux infrastructure might be unstable in this initial
initial period, and we end up receiving false failure notification
emails. (Even appveyor windows builds
I thought this might be interesting because currently appveyor is only used
with MSVC and LLVM 3.3.1
They can however provide Ubuntu 16.04 LTS. Its free for OSS.
You only need some kind of repository.
Basic setup is easy
https://www.appveyor.com/docs/
The hard part is the appveyor.yml file,
