remove gnupg field

add custom list field mechanism

models/User.py

@@ -8,6 +8,11 @@ from models.Union import Union
 from restapi import Methods
 
 
+class UserCustomFields(EmbeddedDocument):
+    name = StringField()
+    value = StringField()
+
+
 class User(Document):
     meta = {
         'index_background': True,
@@ -104,7 +109,7 @@ class User(Document):
         'Transsexual Woman',
         'Two-Spirit'
     ))
-    gnupg_fingerprint = StringField()
+    customn_fields = ListField(EmbeddedDocumentField(UserCustomFields))
     user_group = ReferenceField(Group)
     payment_group = ReferenceField(PaymentGroup)