Fixed EnvironmentRun to be properly multiprocess.

Fixed the prioirity of bad states to be the smallest
[TODO] Make EnvironmentEpisode properly multiprocess

rltorch/agents/DQNAgent.py

@@ -13,7 +13,7 @@ class DQNAgent:
         self.config = deepcopy(config)
         self.logger = logger
 
-    def learn(self):
+    def learn(self, logger = None):
         if len(self.memory) < self.config['batch_size']:
             return