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.
Zsh is a shell designed for interactive use, although it is also a powerful
scripting language. More information can be found on the "Zsh Web Pages"
sites.
Signed-off-by: Max Howell <max@methylblue.com>
I de-versioned the install directories aas this is typically what we do.
