.osx: Fix typo

Ref. #183.
Update README to reflect these being my dotfiles

Time to take ownership!
Use Solarized Light Terminal theme
Correct some comments & the URL for .osx
Set for-each-ref git alias correctly
New, sexy prompt colors from @Wilto :beer:
Merge branch 'master' of github.com:mathiasbynens/dotfiles

# By Matt Widmann
# Via Mathias Bynens
* 'master' of github.com:mathiasbynens/dotfiles:
  .osx: Fix typo