updated homebrew version to 1.8.7

https://trello.com/c/evcXQD4t/334-update-kitchenplan-config-to-fix-homeb
rew-installation-process
changed homebrewalt source to forked repo

forked homebrewalt repo and changed kitchen plan homebrewalt source to
that repo.
changed homebrewalt reference

changed homebrewalt reference back to original github repo the issue
was fixed with no version or tag attached yet
Merge pull request #3 from thegarage/update-homebrewalt-version

update-homebrewalt-version