Merge pull request #1 from cubranic/bundler-friendly

Run 'brew' via 'sudo' to force a clean environment
Revert until we can deal with https://github.com/kitchenplan/chef-homebrewalt/commit/3184aaef2aacc4f34d06ea4dd3c9eb168447c5b0#commitcomment-5535990
Fix check for installed packages which always errors when upgrade is not required
Merge pull request #2 from betamatt/feature/fix-update

Fix check for installed packages which always errors when upgrade is not required.