Fix for Rails 4, see - rubycas#27

Author: Rob Myers

lib/rubycas-client-rails.rb

@@ -18,6 +18,10 @@ class Filter
     @@log = nil
     @@fake_user = nil
     @@fake_extra_attributes = nil
+
+    def before(controller)
+      self.filter controller
+    end
 
     class << self
       def setup(config)