Fix inverted logic when enabling 256 colors on screen
* usr/lib/byobu/ec2_cost, usr/lib/byobu/hostname,
  usr/lib/byobu/include/shutil, usr/lib/byobu/ip_address:
  - fix regression, must hook wget -o- to stdout
releasing 5.45
opening 5.46
* usr/bin/byobu: LP: #1173354
  - if tput colors is 256, use screen-256color in byobu-screen
* usr/share/byobu/keybindings/f-keys.tmux: LP: #1190290
  - handle spaces in windows and layouts properly
* usr/lib/byobu/include/common: LP: #1180427
  - handle zsh's interpretation of "command -v", let it fall through
    to use 'type' for BYOBU_TEST
* usr/bin/byobu-config: LP: #1177997
  - use decimal for os.makedirs() permission for compatibility
    with older+newer python versions
* usr/bin/byobu: LP: #1195726
  - zeroing out window titles in byobu-screen is causing other problems,
    especially when the user defines shelltitle in ~/.screenrc
* usr/share/byobu/profiles/tmux:
  - let's try tmux's automatic titles again
releasing 5.46
opening 5.47