Gemfile in lines-engine-0.6.2 vs Gemfile in lines-engine-0.9.0

@@ -21,9 +21,10 @@
 
 
 group :development do
   gem 'capistrano'
   gem 'yard'
+  gem 'autoprefixer-rails'
 end
 
 group :development, :test do
   gem 'rspec-rails'
   gem 'factory_girl_rails', require: false