added repr for client showing the overview

grum/rpc/rpcclient.py

@@ -8,4 +8,12 @@ class RPCClient(xrc.ServerProxy):
         super().__init__(uri, *args, **kwargs)
 
 
+    def __repr__(self):
+        orig = super().__repr__()
+        head = orig.strip("<>").rstrip("/")
+        head += " exposing:\n\n"
+        help = self.utils.help()
+        return head + help
+
+