Changed all functions in itemstore to use Vec<u8> instead of String

- so that keys/values can be binary files (with invalid utf-8)
- compiler says it works, but not tested at all

proto-spec.md

@@ -0,0 +1,15 @@
+
+# The miZe Protocol
+
+Simple Messages that are sent between client and server via WebSockets or unix sockets.
+
+## A Message
+
+
+## Commands
+
+### From client to server
+- 
+
+### From server to client
+