Added README

README.md

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+ A Message Bus server and library written in Go
+
+**WIP:** THis is still highly experimental and not fit for production use.
+
+## Install
+
+```#!bash
+$ go install github.com/prologic/msgbus/...
+```
+
+## Usage
+
+Run the message bug daemon/server:
+
+```#!bash
+$ msgbusd
+```
+
+Subscribe to a topic using the message bus client:
+
+```#!bash
+$ msgbus sub foo
+2017/06/07 21:52:27 Listening for messages from ws://localhost:8000/push/foo
+2017/06/07 21:52:36 Received: hello
+2017/06/07 21:52:50 Received: hello
+^C
+```
+
+Send a few messages with the message bug client:
+
+```#!bash
+$ msgbus pub foo hello
+$ msgbus pub foo hello
+```
+
+## Design
+
+Design decisions so far:
+
+* In memory queues
+* HTTP API
+* Websockets for realtime push of events
+
+Enjoy :)