[+] Callback and fields for receipt-by-receipt signing process
[+] Limitations update by timestamp and by traffic

[+] success/response codes
[+] New callbacks

commit 255391fe
Author: Dmtiriy Gerasimov <naeper@demlabs.net>
Date:   Tue Apr 30 23:02:40 2019 +0700

    [*] Fixes