Step 1 Moves git_projects & git_scripts under sprout-osx-git

including attributes and templates. This fixes some problems from
commit 23c87c1147f2f003f4b63f55bb19f8162e6290d5 which was an
aggressive purge of shim-recipes in the pivotal_workstation
cookbook.
Step 2 Updates recipe to use new cookbook

fixing some of commit 23c87c1147f2f003f4b63f55bb19f8162e6290d5