Add a simple example of local usage

Interpreter.hs

@@ -5,7 +5,7 @@ import IServ.Remote.Message
 import IServ.Remote.Interpreter
 
 verbose :: Bool
-verbose = True
+verbose = False
 
 main :: IO ()
 main = do

local-example.sh

+#!/usr/bin/env bash
+
+set -e
+
+GHC="${GHC:-ghc}"
+port=5005
+
+cabal build -w "$GHC" iserv-proxy
+cabal run -w "$GHC" iserv-proxy-interpreter $port . &
+interpreter=$?
+
+proxy="$(cabal list-bin -w "$GHC" exe:iserv-proxy)"
+echo "print \"Hello world!\"" | \
+    "$GHC" \
+    --interactive \
+    -fexternal-interpreter \
+    -pgmi "$proxy" \
+    -opti 127.0.0.1 -opti$port
+
+kill $interpreter