Don't overwrite XmlSimple.xml_in with FasterXmlSimple's version

FasterXmlSimple#xml_in isn't 100% compatible with XmlSimple#xml_in.
This can cause unexpected results when both libraries are being used.
Since we're bundling FasterXmlSimple (and not relying on gems) we can
fix it in place.

Author: packagethief

lib/aws/s3.rb

@@ -54,7 +54,7 @@
     # have to use a version greater than '0.3.8.2'.
     raise LoadError unless XML::Parser::VERSION > '0.3.8.2'
     $:.push(File.join(File.dirname(__FILE__), '..', '..', 'support', 'faster-xml-simple', 'lib'))
-    require_library_or_gem 'faster_xml_simple' 
+    require 'faster_xml_simple'
     FasterXmlSimple
   rescue LoadError
     XmlSimple

support/faster-xml-simple/lib/faster_xml_simple.rb

@@ -180,8 +180,11 @@ def parse(string)
     end
 end
 
-class XmlSimple # :nodoc:
-  def self.xml_in(*args)
-    FasterXmlSimple.xml_in *args
-  end
-end
+# Don't overwrite XmlSimple.xml_in since FasterXmlSimple's implementation isn't
+# 100% compatible.
+#
+# class XmlSimple # :nodoc:
+#   def self.xml_in(*args)
+#     FasterXmlSimple.xml_in *args
+#   end
+# end