Merge pull request #61 from joostjager/update-readme

README: Add routerrpc sub-server tag

Author: Roasbeef

README.md

@@ -69,7 +69,7 @@ tags that enable the swap. This enables the required lnd rpc services.
 
 ```
 cd lnd
-make install tags="signrpc walletrpc chainrpc invoicesrpc"
+make install tags="signrpc walletrpc chainrpc invoicesrpc routerrpc"
 ```
 
 Check to see if you have already installed lnd. If you have, you will need to