Fix: move all gems to bundler
Clean-up: Rakefile

 * remove duplicate lint tasks
 * remove lint completely because it's slow
Clean-up: epic fail setting for foodcritic
Change: update the latest rubocop
Update: lock chef at the one we're using on OpsWorks
Merge pull request #225 from till/fix/tests

Fix: move all gems to bundler
Fixed tests: Merge branch 'master' into t/domainnamelength