added rails-observers gem as in rails 4 it was taken out of core.

rot-13 · Apr 9, 2014 · c74e566 · c74e566
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commit c74e566
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diff --git a/Gemfile b/Gemfile
@@ -5,6 +5,7 @@ gem 'jbuilder', '~> 2.0'
 gem 'sdoc', '~> 0.4.0',          group: :doc
 gem 'spring',        group: :development
 gem 'jquery-rails'
+gem 'rails-observers', '~> 0.1.2'
 gem 'rails_12factor', group: :production # for heroku
 
 # assets

diff --git a/Gemfile.lock b/Gemfile.lock
@@ -172,6 +172,8 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.1.0)
       sprockets-rails (~> 2.0)
+    rails-observers (0.1.2)
+      activemodel (~> 4.0)
     rails_12factor (0.0.2)
       rails_serve_static_assets
       rails_stdout_logging
@@ -251,6 +253,7 @@ DEPENDENCIES
   pg
   pusher
   rails (= 4.1.0)
+  rails-observers (~> 0.1.2)
   rails_12factor
   sass-rails (~> 4.0.3)
   sdoc (~> 0.4.0)