add freeze_debianver command to setup.py
Merge remote-tracking branch 'kali/add-debian-freezever' into develop
Move get_email_charset to this module
Merge remote-tracking branch 'chiiph/bug/refactor_mail_utils' into develop
Fold in changes
Merge branch 'release-0.3.5'
Merge tag '0.3.5' into debian

Tag leap.common version 0.3.5
bump changelog
freeze debian ver to 0.3.5