chef support for config overlay

sync a config repo
run make import
with specific role for Open Opportunities config
customized deploy now works on vagrant

include debug logging with Vagrant build
since we’re usually using it for debugging
or for new devs
older version of chef didn't match names correctly
fix docs for chef atttrs

git_revision is the branch to fetch
git_branch is the branch to create on the vm
we should build assets after make import
Merge pull request #356 from ultrasaurus/devel-customized-deploy

Devel customized deploy