added sync_with_gateway change function in wnf.py
diff --git a/wnf.py b/wnf.py
index cc82eb5..4f18187 100755
--- a/wnf.py
+++ b/wnf.py
@@ -56,7 +56,8 @@
 						help="export doc")
 	parser.add_option('--install', nargs=3, metavar = "rootpassword dbname source",
 						help="install fresh db")
-	
+	parser.add_option('--sync_with_gateway', nargs=1, metavar = "1/0", help="Set or Unset Sync with Gateway")
+
 	return parser.parse_args()
 	
 def run():
@@ -138,7 +139,18 @@
 		from webnotes.install_lib.install import Installer
 		inst = Installer('root', options.install[0])
 		inst.import_from_db(options.install[1], source_path=options.install[2], \
-			password='admin', verbose = 1)		
+			password='admin', verbose = 1)
+	
+	elif options.sync_with_gateway:
+		if int(options.sync_with_gateway[0]) in [0, 1]:
+			webnotes.conn.begin()
+			webnotes.conn.sql("""\
+				UPDATE `tabSingles` SET value=%s
+				WHERE field='sync_with_gateway' AND doctype='Control Panel'""", int(options.sync_with_gateway[0]))
+			webnotes.conn.commit()
+			webnotes.message_log.append("sync_with_gateway set to %s" % options.sync_with_gateway[0])
+		else:
+			webnotes.message_log.append("ERROR: sync_with_gateway can be either 0 or 1")
 	
 	# print messages
 	if webnotes.message_log: