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.
CVT testers & omnibus testers run the same amount of tests. The difference is that CVT tests don't perform a build where omnibus testers run from an omnibus package.

We currently don't have "smoke tests" separated out from the rest.