Added support for querying only occupied or vacant units. It's working at the moment, but I'll probably move some more logic to the controller next.

git-svn-id: file:///svn-source/pmgr/branches/initial_20090526/site@29 97e9348a-65ac-dc4b-aefc-98561f571b83

models/unit.php

@@ -45,5 +45,8 @@ class Unit extends AppModel {
 		)
 	);
 
+	function occupiedEnumValue() {
+	  $enums = $this->getEnumValues('status');
+	  return $enums['OCCUPIED'];
+	}
 }
-?>