Gem updates

Update to resolve [CVE-2013-0269](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0269).  Both `chef` and `knife-ec2` were impacted.  

There were a few other things impacting the chef-client including heartbleed and [CVE-2014-2525](http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2525).

Added .vagrant to the .gitignore.