Eliminate a potentially-confusing aspect of FactoryGirl example.

I don't want someone to think that `#titleize` is necessary.

README.markdown

@@ -23,7 +23,7 @@ This library was first developed to use in factories. It can be used
 with Factory Girl like this.
 
     Factory.define(:user) do |u|
-      u.name  { "#{RandomWord.adjs.next.titleize} User" }
+      u.name  { "#{RandomWord.adjs.next} User" }
       u.email { "#{name.gsub(/ +/, '.')}@example.com" }
     end