add delay in hasher and rng

dockercoins/rng/rng.py

@@ -1,6 +1,7 @@
 from flask import Flask, Response
 import os
 import socket
+import time
 
 app = Flask(__name__)
 
@@ -19,6 +20,8 @@ def index():
 
 @app.route("/<int:how_many_bytes>")
 def rng(how_many_bytes):
+    # Simulate a little bit of delay
+    time.sleep(0.1)
     return Response(
         os.read(urandom, how_many_bytes),
         content_type="application/octet-stream")