* Put release notes in notes subdir

Verbatim copy of the current set of notes on coredns.io. Copy them
here to make them authoritative.

'make sync' on the coredns.io site copies them back in. They need to be
formatted in Hugo style.
Signed-off-by: Miek Gieben <miek@miek.nl>

* pull latest
Signed-off-by: Miek Gieben <miek@miek.nl>