fixed issue where response.body was a Net::ReadAdapter instead of a s…

…tring

lib/httparty/response.rb

@@ -9,7 +9,7 @@ def self.underscore(string)
     def initialize(request, response, parsed_block, options={})
       @request      = request
       @response     = response
-      @body         = response.body || options[:body]
+      @body         = options[:body] || response.body
       @parsed_block = parsed_block
       @headers      = Headers.new(response.to_hash)
     end