Problem: need to relicense libzmq (#2461)

Solution: add jimklimov.md for my part

RELICENSE/jimklimov.md

+# Permission to Relicense under MPLv2 or any other OSI approved license chosen by the current ZeroMQ BDFL
+
+This is a statement by Evgeny (Jim) Klimov
+that grants permission to relicense his copyrights in the libzmq C++
+library (ZeroMQ) under the Mozilla Public License v2 (MPLv2) or any other
+Open Source Initiative approved license chosen by the current ZeroMQ
+BDFL (Benevolent Dictator for Life).
+
+A portion of the commits made by the Github handle "jimklimov",
+with commit author "Jim Klimov <jim@jimklimov.com>" or
+"Jim Klimov <jimklimov@gmail.com>", are copyright of Evgeny (Jim) Klimov.
+This document hereby grants the libzmq project team to relicense libzmq,
+including all past, present and future contributions of the author listed
+above.
+
+Evgeny (Jim) Klimov  
+2017/03/21