Update OpenSSL on Windows to 1.0.0n

Update for Security Advisory from 2014-08-06
https://www.openssl.org/news/secadv_20140806.txt
Merge pull request #294 from opscode/btm/openssl-windows-security-fix

Update OpenSSL on Windows to 1.0.0n
Update valid robocopy exit codes to account for git caching

The destination folder might have `.gitkeep` files which are created
by Omnibus to ensure directories are properly persisted in the git cache.
Add version info for RubyGems 2.4.1