Add a line for the fix to issue 1563 (broken git shallow-clone).
serverspec 2 fixes to e2e tests

also some cleanup in the os-detection
Merge pull request #2178 from opscode/lcg/serverspec-2

serverspec 2 fixes
homebrew_owner now tries to run homebrew as the user who owns the `brew` executable, or an optional homebrew_package resource attribute
Providing documentation for end-users, updating code with PR comment
Missed file on last commit
Fixing documentation errors
Moving documentation to a more logical place.  Also no longer dis-allowing users from running brew as root.
Fixing test