Merge pull request #7 from tonybyrne/master

Preserve ActiveRecord semantics / Don't require models to be valid before destroy or delete.

lib/paranoia.rb

@@ -10,7 +10,10 @@ module Paranoia
   def destroy
     _run_destroy_callbacks
     self[:deleted_at] ||= Time.now
-    self.save    
+    # If the instance has already been persisted, then we need to re-save it to flag it as
+    # destroyed / deleted.  We don't require validation in case it causes the updated to fail.
+    save(:validate => false) if persisted?
+    freeze
   end
   alias :delete :destroy