Merge pull request #111 from ryandub/master

Update Berk lock file
Prepare for travis-ci
Merge pull request #113 from ryandub/add_travis

Prepare for travis-ci
More travis cleanup
Merge pull request #114 from ryandub/add_travis

More travis cleanup
Exclude vendor/bundle
Merge branch 'master' of github.com:rackerlabs/ohai-plugins