added audio video
Merge branch 'master' of github.com:fergusb/dotfiles

* 'master' of github.com:fergusb/dotfiles:
  added webm to gitattributes
  updated gitattributes media filetypes
  added SSH_AUTH_SOCK helper
  added gitattributes
  removed Source Tree medlin'
  README to README.md
  updated README
  added a few hg aliases
  updated installer for hg
  added initial hg configs
  added classical MPD settings