fix model specs

lib/merged.rb

@@ -3,4 +3,18 @@ require "merged/engine"
 
 module Merged
 
+  def self.load_data
+    ["card_style" , "section_style" , "option"].each do |kind|
+      # loading egine definitions first, can be overriden
+      load_from kind , Engine.root.join("config/merged/#{kind}.yaml")
+    end
+    Page.load_pages
+    Image.load_images
+  end
+
+  def self.load_from( kind , path )
+    return unless File.exists?(path)
+    clazz = "Merged::#{kind.camelcase}".constantize
+    clazz.load(YAML.load_file( path ))
+  end
 end