Grab tags from yaml if they exist and throw them in the db.

fedbadges/rules.py

@@ -109,6 +109,7 @@ def __init__(self, badge_dict, tahrir_database, issuer_id):
                 image=self._d['image_url'],
                 desc=self._d['description'],
                 criteria=self._d['discussion'],
+                tags=','.join(self._d.get('tags', [])),
                 issuer_id=issuer_id,
             )
             transaction.commit()