Release 1.2.2

Fixes a rare bug which could lead to lost input. see commit 3af4fa5 for details.

http://ftp.barfooze.de/pub/sabotage/tarballs/jobflow-1.2.2.tar.bz2

$ sha512sum jobflow-1.2.2.tar.bz2 
864473c15c65e95f292dba0df74a96a8ec2e4765f1c94908ef72d25a48c0253396c2b5a2de220333599e6f5b8b900f50296b9d803efe108d21c30fd3d736ab8d  jobflow-1.2.2.tar.bz2