Remove another underscore turd

Basically, these two files have a unified concern and are short enough that they can go together in the same file.
Fix up handlers correctly

Turns out i didn't grok the master recipe, so this undos that change
Add ruby version and berksfile for fun
Add a definition to subscribe a client to set of checks

The goal is to have the ability to put a bunch of server defined checks with subscribers on one side and client defined subscriptions on the other side. One cookbook is applied to the sensu master and the other to the client. This uses a Chef library to modify the attributes correctly using the attributes as a temporary store and then uses definition to invoke chef-rewind to update the client.json config. Internally, the code could be named better, but the interface is simple

subscribe_to "some subscription"

will add that subscription to a host. The entire subscription list can be overriden later and then reapplied with chef-rewind if this is done programmatically.
Redis now uses subscribe_to
Here's a bunch of host checks for debian systems.

Rather than using a case statement on platform, we just create a subscription of checks for Debian-like systems directly. This is because we use nagios-plugins and check apt among other things. It also demonstrates a good client and server approach.