Added tagaldelic module to give tag clouds

http://drupal.org/project/tagadelic

Particularly, I'd like to use it with the Model catalogue but it should be useful anyway.

Tag cloud blocks can be assigned by roles (user groups) initially but this isn't very flexible. Showing associated  tag clouds when viewing content is desirable. (E.g. a Model tag cloud when viewing the model catalogue.) To do this we need urls that catagorise content and so need the pathauto model.