Fixed #349 - update contact field to StringField

Signed-off-by: Chin Yeung Li <[email protected]>

Author: chinyeungli

src/attributecode/model.py

@@ -735,7 +735,7 @@ def create_fields(self):
 
             ('owner', StringField()),
             ('owner_url', UrlField()),
-            ('contact', ListField()),
+            ('contact', StringField()),
             ('author', ListField()),
             ('author_file', FileTextField()),