muting pygame's hello message (#116)

rl_coach/agents/human_agent.py

@@ -18,6 +18,8 @@ import os
 from collections import OrderedDict
 from typing import Union
 
+import contextlib
+with contextlib.redirect_stdout(None):
     import pygame
 from pandas import to_pickle
 

rl_coach/renderer.py

@@ -15,6 +15,8 @@
 #
 
 import numpy as np
+import contextlib
+with contextlib.redirect_stdout(None):
     import pygame
 from pygame.locals import HWSURFACE, DOUBLEBUF