Platform support policy proposal

There is a fair amount of confusion about the specific operating system platforms, platform versions, etc. that Chef Software, Inc. supports for its products. This RFC will clarify this by calling out the individual operating systems and their releases as explicitly supported or not.
And i'd prefer to see Amazon Linux and SmartOS builders/testers than OEL/RHEL testers for chef-client.  Wasting a lot of effort on OEL and RHEL to learn that we already support those distros pretty well for just about zero code effort is a lot less useful than supporting SmartOS (where we don't have any omnibus build) or even Amazon (which is not a straight RHEL recompile and is where I'd expect to see weirdness crop up because... Amazon).