Updated logging in trainer.

- The logger in trainer.py is now unitytrainers. This makes it
easier to differentiate it from unityagents logs.

python/unityagents/environment.py

         """
         if config is None:
             config = self._resetParameters
-        elif config != {}:
-            logger.info("\nAcademy Reset with parameters : \t{0}"
+        elif config:
+            logger.info("Academy reset with parameters: {0}"
                         .format(', '.join([str(x) + ' -> ' + str(config[x]) for x in config])))
         for k in config:
             if (k in self._resetParameters) and (isinstance(config[k], (int, float))):

python/unitytrainers/trainer.py

 
 from unityagents import UnityException, AllBrainInfo
 
-logger = logging.getLogger("unityagents")
+logger = logging.getLogger("unitytrainers")
 
 
 class UnityTrainerException(UnityException):