Fix wrong dependency, ActiveRecord(4.0.1) incompatible with this regexps /^$/

 gem.add_dependency 'activerecord', '=> 3.2.0'
Makes bundler install the last activerecord version, that in the moment of writings this is 4.0.0, this activerecord version breaks this gem because of changes in regular expressions see this http://dev.mensfeld.pl/2013/07/upgrading-to-rails-4-0-from-rails-3-2-test-case-part-ii-assets-models/#regexp