EppO/rolify — pull request #191 by mhw (2013-10-03 09:56:12+00:00)
Title: Fix has_any_role? to work with unsaved records.

`has_any_role?` doesn't work with unsaved records, while `has_role?` does. Here's the current behaviour:

>> u = User.new
=> #
>> u.add_role :administrator
=> #
>> u.has_role? :administrator
=> true
>> u.has_any_role? :administrator
=> false

This patch fixes the issue so that in the above example `has_any_role?` would return true.