Merge commit '37f62206236dbfe89c15990cd506e5e40dc256b2' * commit '37f62206236dbfe89c15990cd506e5e40dc256b2': Minor changes to api levels doc and upgrading doc. Change Linux "tested on" to Hardy Heron.
Merge commit '37f62206236dbfe89c15990cd506e5e40dc256b2' * commit '37f62206236dbfe89c15990cd506e5e40dc256b2': Minor changes to api levels doc and upgrading doc. Change Linux "tested on" to Hardy Heron.