- Updated to released version of Berkshelf (@juliandunn)
- Incorporate @dschlenk fixes:

    Add attribute to control the max size of cached files.
    Update test kitchen CentOS 6 platform to 6.5.
    Add missing default value for cache_size.
    Add kitchen-openstack to cloud group in Gemfile.
    Rubocop -> RuboCop in Rakefile; pin rubocop version to ~> 0.23.0.
    Fix other Rubocop problems.