o add /etc/default/sensu as a config file, so when updating rpm this file is not obliterated if it has been modified outside of the rpm, fixes https://github.com/sensu/sensu-build/issues
Merge pull request #85 from xyntrix/master

o add /etc/default/sensu as a config file, so when updating rpm this fil...
[updates] removed sensu-dashboard, use opscode bento images, use packagecloud.io
[updates] use vagrant-omnibus to install chef (for its ruby), updates para-vagrant and the sensu-plugin recipe