fx::validate::mail-config - Extended with footer/signature information
fx::mailer - New method for access to all parts of the mail config. Plus pseudo-key for project name. Dropped sender-specific method, not used anyway.
fx::note - Simplified and extended project information retrieval via the mailer method and key.
fx::mailgen - Extended to insert a footer/signature into the generated notification mails
fx::note, fx::mailgen - Added proper footer to the test mail for the mail-config. Dropped wrongly introduced mailer dependency in the generator.