1.1.3dev: Deprecate classes `Notify`, `NotifyEmail`, `TicketNotifyEmail` and `BatchTicketNotifyEmail`. (refs #11823, #11854, #3517)

Useful code for message formatting will be moved into `TicketFormatter`.

git-svn-id: http://trac.edgewall.org/intertrac/log:/trunk@13578 af82e41b-90c4-0310-8c96-b1721e28e2e2