[entities] include title when comparing ads

entities.py

@@ -134,7 +134,7 @@ def reset_proximity_cache():
 def update_proximity_cache(_cw):
     rset = _cw.execute('Any X WHERE X is ClassifiedAd')
     for entity in rset.entities():
-        VSM.add_text(entity.eid, entity.description)
+        VSM.add_text(entity.eid, ' '.join([entity.title]*3+[entity.description]))
     #VSM.compute_similarities()
 
 class ClassifiedAd(AnyEntity):