Add default atari config

default_atari_config.yaml

@@ -0,0 +1,13 @@
+train:
+  id: null
+  done_on_life_loss: True
+  size: 64
+  max_episode_steps: null
+  
+test:
+  id: ${..train.id}
+  done_on_life_loss: False
+  size: ${..train.size}
+  max_episode_steps: null
+
+keymap: atari/${.train.id}