Platform support policy proposal

:construction: but you can comment on it. Mostly the construction is missing versions for OSes that I don't know that much about (Arch, Gentoo, etc.)
I think it's important to capture what the desired state is, since it is an RFC, and then once adopted we put things in compliance. There are target platforms (e.g. Ubuntu 11.04) that are EOL that we should no longer build for, for example.