Merge pull request #228 from subvisual/mp-ruby-2.3

Adds rubocop in ruby 2.3

Author: egonSchiele

Gemfile

@@ -6,7 +6,7 @@ group :test do
   gem "rspec"
   gem "aruba"
   gem "cucumber", "~> 1.3.20"
-  gem "rubocop", "~> 0.29.1", :platform => [:ruby_20, :ruby_21, :ruby_22]
+  gem "rubocop", "~> 0.29.1", :platform => [:ruby_20, :ruby_21, :ruby_22, :ruby_23]
 end
 
 group :development do