Add quote for id in sql request (for when id is a uuid string for example).
Add missing quote for id in sql request.
Merge pull request #69, "Add quotes to Id in SQL requests" from github.com:webdoc

* 'master' of github.com:webdoc/acts_as_list:
  Add missing quote for id in sql request.
  Add quote for id in sql request (for when id is a uuid string for example).

Conflicts:
	lib/acts_as_list/active_record/acts/list.rb