Individual contact with the same name can't be distinguished on CiviCRM CCK Contact Reference field

Problem:

The idea of this patch is to overcome the issue being able to distinguish 2 people in the CiviCRM database with the same name when searching for them using the autocomplete field in the CiviCRM CCK Contact Reference Drupal module.

Currently entering 'Wilson' will list:

Wilson, Frank
Wilson, Mark
Wilson, Paul
Wilson, Paul
Wilson, Samantha

This means that it is impossible to differentiate between the 2 Paul Wilsons. I would like the autocomplete to instead display:

Wilson, Frank - Company A
Wilson, Mark - Company B
Wilson, Paul - Company C
Wilson, Paul - Company D
Wilson, Samantha - Company E

Solution:

This patch changes what is displayed in the autocomplete to Display name - Organisation name

I looked through the issues relating to this module and it doesn't seem to conflict with any future developments.
I wasn't sure about the naming convention for a patch here, hope its ok.