allow renaming of the guardian

erpnext/education/doctype/guardian/guardian.json

@@ -2,7 +2,7 @@
  "allow_copy": 0, 
  "allow_guest_to_view": 0, 
  "allow_import": 1, 
- "allow_rename": 0, 
+ "allow_rename": 1, 
  "autoname": "GARD.####", 
  "beta": 0, 
  "creation": "2016-07-21 15:32:51.163292", 
@@ -507,7 +507,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2017-12-06 18:17:38.090252", 
+ "modified": "2018-03-07 12:51:06.941609", 
  "modified_by": "Administrator", 
  "module": "Education", 
  "name": "Guardian",