Merge pull request #146 from needle-cookbooks/force-confnew

updating package_options for debian to prefer new config files
[runit] adding sensu.use_embedded_runit attribute
[runit] adding sensu.embedded_directory attribute
[runit] adding lwrp for enabling/disabling services via embedded runit
[runit] updating service recipes to make use of embedded runit
[runit] ensuring init scripts from package are replaced with symlinks to embedded sv binary
[runit] prefer sensu_ctl configured? over initctl status