s/require 'brewkit'/require 'formula'/g
s/require 'brewkit'/require 'formula'/g

brewkit.rb changes ENV destructively, so lets not do that everytime a formula
is required. Now it's possible for other tools to require a formula
description without worrying about side-effects.

philcook/homebrew-php,TomK/homebrew-php,ablyler/homebrew-php,mkalkbrenner/homebrew-php,dguyon/homebrew-php