Add support for specifying the cacher-ng interface.
include COOK-3707 for v2.2.0
COOK-3707 merge
Check for the existence of apt-get to conditionally run the default recipe
Fix README formatting
Remove ::Chef namespace to avoid conflicts
Version bump to v2.2.1
Version bump to v2.2.2
Switch to resource guards instead of just returning
Include the helper methods in the Resource, Recipe, and Provider
Allow user to bypass apt cache via attributes

 * User should add attribute ['apt']['cache_bypass']
 * Value should be an array, where each key is a server and value is protocol, eg:
     "download.oracle.com":"http"