Feature/ws cli (#15)

* New command line tool for transfering files / still very beta.

* add readme

* use cli11 for argument parsing

* json -> msgpack

* stop using base64 and use binary which can be stored in message pack

ws/ixcrypto/IXHash.h

@@ -0,0 +1,15 @@
+/*
+ *  IXHash.h
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2018 Machine Zone. All rights reserved.
+ */
+
+#pragma once
+
+#include <vector>
+
+namespace ix
+{
+    uint64_t djb2Hash(const std::vector<uint8_t>& data);
+}
+