Changed nationality in student master from link to data field

erpnext/schools/doctype/student/student.json

@@ -386,7 +386,7 @@
    "collapsible": 0, 
    "columns": 0, 
    "fieldname": "nationality", 
-   "fieldtype": "Link", 
+   "fieldtype": "Data", 
    "hidden": 0, 
    "ignore_user_permissions": 0, 
    "ignore_xss_filter": 0, 
@@ -395,7 +395,7 @@
    "label": "Nationality", 
    "length": 0, 
    "no_copy": 0, 
-   "options": "Country", 
+   "options": "", 
    "permlevel": 0, 
    "precision": "", 
    "print_hide": 0, 
@@ -762,7 +762,7 @@
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2016-09-08 06:29:27.702968", 
+ "modified": "2016-10-07 15:36:39.936505", 
  "modified_by": "Administrator", 
  "module": "Schools", 
  "name": "Student", 
@@ -779,6 +779,7 @@
    "export": 1, 
    "if_owner": 0, 
    "import": 0, 
+   "is_custom": 0, 
    "permlevel": 0, 
    "print": 1, 
    "read": 1,