Update readme

Author: coadler

README.md

@@ -34,7 +34,8 @@ Use this key to authenticate other wush commands to this instance.
 On the client machine:
 
 ```bash
-$ wush send 1gb.txt
+# Copy a file to the receiver
+$ wush cp 1gb.txt
 Auth information:
     > Server overlay STUN address:  Disabled
     > Server overlay DERP home:     New York City
@@ -44,10 +45,11 @@ Bringing Wireguard up..
 Wireguard is ready!
 Received peer
 Peer active with relay  nyc
-Peer active over p2p  172.20.0.13:53768
+Peer active over p2p  172.20.0.8:53768
 Uploading "1gb.txt" 100% |██████████████████████████████████████████████| (2.1/2.1 GB, 376 MB/s)
 
-$ wush
+# Open a shell to the receiver
+$ wush ssh
 ┃ Enter the receiver's Auth key:
 ┃ > 112v1RyL5KPzsbMbhT7fkEGrcfpygxtnvwjR5kMLGxDHGeLTK1BvoPqsUcjo7xyMkFn46KLTdedKuPCG5trP84mz9kx
 Auth information: