vim: improve titlestring handling, with tmux support
Update submodule oh-my-zsh 7449e6e...ab23659

* oh-my-zsh 7449e6e...ab23659 (4):
  > enhance title / tmux interaction, using U+FEFF
  > theme: color adjustments
  > title: fixes for OpenVZ container
  > Consider fuse.bup-fuse to be a slow FS
vimrc: backup settings
vimrc: committing some of my local mess^Wchanges
Merge remote-tracking branch 'origin/master'