Update to version 1.438
Fix compile for non-standard homebrew location like /opt/local
Add manpage
Make update comment visible in caveats
Signed-off-by: Adam Vandenberg <flangy@gmail.com>
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.