add back rails for tests, but only as a development dependency.

Author: natemontgomery

react-rails.gemspec

@@ -26,6 +26,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'poltergeist', '>= 0.3.3'
   s.add_development_dependency 'test-unit', '~> 2.5'
   s.add_development_dependency 'turbolinks', '>= 2.0.0'
+  s.add_development_dependency 'rails', '>= 3.2'
 
   s.add_dependency 'coffee-script-source', '~>1.8'
   s.add_dependency 'connection_pool'