Lists list and CUD

Custom forms list
Updated DB schema (not yet implemented in the server, which means that most of the server is not broken).
- custom forms are independent of a list
- order and visibility of fields is now in custom_fields
- first_name and last_name has been turned to a regular custom field

lib/models/lists.js

@@ -6,15 +6,7 @@ let shortid = require('shortid');
 let segments = require('./segments');
 let _ = require('../translate')._;
 let tableHelpers = require('../table-helpers');
-
-const UnsubscriptionMode = {
-    ONE_STEP: 0,
-    ONE_STEP_WITH_FORM: 1,
-    TWO_STEP: 2,
-    TWO_STEP_WITH_FORM: 3,
-    MANUAL: 4,
-    MAX: 5
-};
+const UnsubscriptionMode = require('../../shared/lists').UnsubscriptionMode;
 
 module.exports.UnsubscriptionMode = UnsubscriptionMode;