Update vim/bundles (per github.com/tpope/vim-pathogen)

gistfile1.py

#!/usr/bin/env python

import os
import os.path

for item in os.listdir('.'):
  if not os.path.isdir(item): continue
  os.chdir(item)
  try:
    print 'Updating "%s"...' % item
    os.system('git pull')
  finally:
    os.chdir('..')