move merchant script in separate dir

scripts/merchant/merchant.conf.template

@@ -0,0 +1,17 @@
+[main]
+host = hostname of the machine where you run this program
+port = choose a port number
+password = choose a password
+
+[sqlite3]
+database = database filename
+
+[electrum]
+mpk = the master public key of your wallet (in hexadecimal)
+chain = second part of the mastrer public key (hexadecimal)
+wallet_path = path where the script will save the wallet
+
+[callback]
+received = URL where we POST json data when payment has been received
+expired = URL where we POST json data if payment has expired
+password = password sent in the json data, for authentication