ENH: mode-line for emacs
ENH: allow to specify the test_dir to override jumping into venv workdir

Is done for in-source testing of Fail2Ban, for which setup was adjusted
ENH: setup monitoring/building of multiple branches for Fail2Ban
BF: need to give every GitPoller a separate name per branch
BF: apparently GitPoller does accept multiple branches - reverting previous changes (should overcome problem with identical hashes of GitPollers)
BF: uff -- join multiple branches into a single name and sanitize possible slashes
BF: removing duplicate poller for f2b
neverendingstory -- apparently it should be under build/ -- isthat build_workdir? ;-)