Updated readme

README.txt

@@ -1,4 +1,36 @@
+# libp2p Demos
 
+## Demo 1:  DHT Peer & Content with Go and JS Nodes
+
+**What it demonstrates:**  A new DHT is created by the Go program `dht-interop`.  In a separate terminal or machine, a Node.js program connects to this DHT.
+
+**First terminal:**
+```
+cd content-dht-provide-find
+make
+./dht-interop
+```
+
+**Second terminal:**  run the command printed out by dht-interop, replacing 127.0.0.1 with the IP of the server where dht-interop is listening.  Example:
+
+```
+node js-dht-test/index.js /ip4/127.0.0.1/tcp/9876/ipfs/QmehVYruznbyDZuHBV4vEHESpDevMoAovET6aJ9oRuEzWa
+```
+
+Note that the node ID of `dht-interop` is always `Qm...RuEzWa` because it is being read in from `util/private_key.bin` (an X.509 private key generated by `util/private-key-gen`).
+
+
+## Demo 2:  PubSub
+
+**What it demonstrates**:  Two Go nodes are created and run a chat server using a shared PubSub topic.  **TODO**:  Should be a Go node and a JS node, once I get the two Go nodes version working.
+
+
+_Acknowledgements:  @jhiesey for DHT (content & peer routing) JS+Go interop, @stebalien for PubSub_
+
+
+
+
+--------------------------------------------
 
 util/private-key-gen -> private_key.bin (marshalled private key that is used for stable peer id of bootstrap server)