README: updated README.md to reflect new install process
README: updated README.md to reflect new install process

niceandserious/crafty-vagrant,chrisdubya/crafty-vagrant,niceandserious/crafty-vagrant,chrisdubya/crafty-vagrant,niceandserious/crafty-vagrant,chrisdubya/crafty-vagrant,chrisdubya/crafty-vagrant,niceandserious/crafty-vagrant