Integrate various fixes around finding model classes, including #82 and #85

Author: alexch

lib/annotate/annotate_models.rb

@@ -317,7 +317,11 @@ def get_model_class(file)
     # Retrieve loaded model class by path to the file where it's supposed to be defined.
     def get_loaded_model(model_path)
       ObjectSpace.each_object(::Class).
-        select { |c| c.ancestors.include?(ActiveRecord::Base) }.
+        select do |c|
+          Class === c and    # note: we use === to avoid a bug in activesupport 2.3.14 OptionMerger vs. is_a?
+          c.ancestors.respond_to?(:include?) and  # to fix FactoryGirl bug, see https://github.com/ctran/annotate_models/pull/82
+          c.ancestors.include?(ActiveRecord::Base) 
+        end.
         detect { |c| ActiveSupport::Inflector.underscore(c) == model_path }
     end