[minor] add paid field in Student Applicant

erpnext/schools/doctype/student_applicant/student_applicant.json

@@ -116,6 +116,32 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "fieldname": "paid", 
+   "fieldtype": "Check", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_list_view": 0, 
+   "label": "Paid", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
   {
    "allow_on_submit": 0, 
    "bold": 0, 
@@ -865,7 +891,7 @@
  "istable": 0, 
  "max_attachments": 0, 
  "menu_index": 0, 
- "modified": "2016-09-08 06:40:54.242322", 
+ "modified": "2016-09-23 14:15:25.153128", 
  "modified_by": "Administrator", 
  "module": "Schools", 
  "name": "Student Applicant", 

erpnext/schools/doctype/student_applicant/student_applicant.py

@@ -15,3 +15,6 @@ class StudentApplicant(Document):
 		student = frappe.get_list("Student",  filters= {"student_applicant": self.name})
 		if student:
 			frappe.throw(_("Cannot change status as student {0} is linked with student application {1}").format(student[0].name, self.name))
+
+	def on_payment_authorized(self, *args, **kwargs):
+		self.db_set('paid', 1)