add announcement file

Change-Id: I3b56a7e3ccb491b8cd4eeba4a4d103b73957a9eb
update use of pbr

Change-Id: I1a57424fd9d2ba8ae268c32fcb5347034f1fa0c8
add tox.ini for style checks

Change-Id: I6d2ae051ddf753447a973df653282e40d4226bb2