document the new git-config options
document the new git-config options

mattn/gist,roxyboy/jist,mofodox/gist,dLobatog/gist,zmwangx/gist,Jwata/gist-old,ConradIrwin/gist,ConradIrwin/jist,defunkt/gist,bchase/gist,retrography/gist,roxyboy/gist,flores/gist,ConradIrwin/gist,ryanbradynd05/gist,eLobato/gist