byobu 5.37 integration

added byobu (a screen replacemnt) which i find better than tmux as i can now type:
    byobu
    du -a /
    (hit ctrl+c) after a while
    and then i can use the konsole or shift+pgup to scrollback

in screen i had to use the ctrl+a pgup and to select text spanning more than 25 lines of the screen teriminal was usually a pain.