Trying to make the gem 1.8.7 compatible

* replaced File.realpath in testsuite with File.expand_path
* removed the old YAML hack

spec/dummy/config/boot.rb

@@ -1,6 +1,3 @@
-require 'yaml'
-YAML::ENGINE.yamler= 'syck'
-
 require 'rubygems'
 gemfile = File.expand_path('../../../../Gemfile', __FILE__)
 

spec/support/helpers.rb

@@ -1,6 +1,6 @@
 module Refinery::WordPress::SpecHelpers
   def test_dump
-    file_name = File.realpath(File.join(File.dirname(__FILE__), '../fixtures/wordpress_dump.xml'))
+    file_name = File.expand_path(File.join(File.dirname(__FILE__), '../fixtures/wordpress_dump.xml'))
     Refinery::WordPress::Dump.new(file_name) 
   end
 end