* usr/lib/byobu/include/config.py: LP: #1286249
  - fall back to using the distro status file, fixes
    crash in config if status file disappears
* usr/share/byobu/profiles/bashrc: LP: #1280550
  - test the $BASH variable, rather than $SHELL, to tell if we're
    running in a bash environment
* usr/share/byobu/profiles/tmux: LP: #1273685
  - remove double sourcing of local .tmux.conf