* usr/share/byobu/pixmaps/Byobu.png:
  - image added for Mac OS X packaging
added .app for Mac
add pkginfo and identifier
added icons for Mac
added icns file
add icon bundle
* usr/bin/byobu-config:
  - throw an error message when we can't import snack
* Applications/Byobu.app/Contents/MacOS/Byobu:
  - add an application launcher for Mac OS X