Initial changes to support role based collectors.
Convert symbols to strings.
Add collector recipes.
Version bumpage.
Changed attribute symbols to strings.
Pass in the collectors we want as a list.  This makes for nice code
in infra-graphing like:

collectors << network
collectors << cpu

instead of hard coding include_recipe everywhere.
Merge pull request #13 from scottso/role_based_collectors

Role based collectors
Added sensible defaults for rabbitmq
Forgot to add them to the recipe, doh.
Merge pull request #14 from scottso/fix_rabbit_port

Fix rabbit port
Merge pull request #8 from att-cloud/master

Syncing up