[Tei-council] release branch

Dear TEI Council: I am about to create the release branch for the release that Syd suggests several code names. I am unilaterally selecting the name "Raven" because Providence has a strong Edgar Allan Poe connection. Please do not commit any further changes, unless they are to the release notes or unless you communicate first with the release technicians or the chair. Release technicians are Hugh Cayless and myself. Thank you! --elli