Enhancement: updates & tests

 * updated dependency to chef11
 * wrote basic chefspec tests for php-fpm and php-apc
 * added rake task
 * updated .travis.yml
Enhancement: added another filter to find
WIP: ruby linter

Takes 5 minutes where the shell command takes 30 seconds or so.
Merge pull request #61 from till/topics/chefspec

Enhancement: updates & tests