maybe, partly, sorta' get 256 color xterm working in screen
Merge branch 'master' of github.com:aeakett/dotfiles

* 'master' of github.com:aeakett/dotfiles:
  add .dmg mounting to extract() (thanks ttscoff)
  different zsh theme
  solarized colours for powerline
  I could have sworn that I already comitted this
  now I'll actuially be able to scp... Thanks Jim
  use personal copy of vim if available
  one more try at adding vim powerline and solarized colours
  trying to clean up this vim bundle submodule mess I've made
  since we're out of the bash business, force launching of zsh (this should make things work under screen)
  we're out of the bash business... if we have a locval copy of zsh, then run it.
  add givedef()