Add letterhead field and mapper in Packing Slip

erpnext/stock/doctype/delivery_note/delivery_note.py

@@ -381,7 +381,8 @@ def make_packing_slip(source_name, target_doc=None):
 		"Delivery Note": {
 			"doctype": "Packing Slip",
 			"field_map": {
-				"name": "delivery_note"
+				"name": "delivery_note",
+				"letter_head": "letter_head"
 			},
 			"validation": {
 				"docstatus": ["=", 0]

erpnext/stock/doctype/packing_slip/packing_slip.json

@@ -158,6 +158,23 @@
    "permlevel": 0, 
    "read_only": 0
   }, 
+  {
+   "fieldname": "letter_head_details", 
+   "fieldtype": "Section Break", 
+   "label": "Letter Head", 
+   "permlevel": 0, 
+   "precision": ""
+  }, 
+  {
+   "allow_on_submit": 1, 
+   "fieldname": "letter_head", 
+   "fieldtype": "Link", 
+   "label": "Letter Head", 
+   "options": "Letter Head", 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 1
+  }, 
   {
    "fieldname": "misc_details", 
    "fieldtype": "Section Break", 
@@ -180,7 +197,7 @@
  "icon": "icon-suitcase", 
  "idx": 1, 
  "is_submittable": 1, 
- "modified": "2014-05-27 03:49:14.251039",
+ "modified": "2014-11-13 16:50:50.423299", 
  "modified_by": "Administrator", 
  "module": "Stock", 
  "name": "Packing Slip",