Merge branch 'master' of gitlab.aicrowd.com:adrian_egli/neurips2020-flatland-starter-kit into feature/DeadLockAvoidance_RL_PostChallenge

# Conflicts:
#	.gitignore
#	README.md
#	aicrowd.json
#	apt.txt
#	environment.yml
#	my_observation_builder.py
#	reinforcement_learning/dddqn_policy.py
#	reinforcement_learning/evaluate_agent.py
#	reinforcement_learning/model.py
#	reinforcement_learning/multi_agent_training.py
#	reinforcement_learning/ordered_policy.py
#	reinforcement_learning/policy.py
#	reinforcement_learning/ppo/ppo_agent.py
#	reinforcement_learning/single_agent_training.py
#	run.py
#	utils/dead_lock_avoidance_agent.py
#	utils/deadlock_check.py
#	utils/observation_utils.py
#	utils/timer.py

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## Server Performance Stats
====================================================================================================
         - message_queue_latency         => min: 0.00038123130798339844 || mean: 0.0015168707755788499 || max: 1.0546770095825195
         - current_episode_controller_inference_time     => min: 0.0006983280181884766 || mean: 0.03446188241071793 || max: 0.4753117561340332
         - controller_inference_time     => min: 0.0006983280181884766 || mean: 0.03446188241071793 || max: 0.4753117561340332
         - internal_env_step_time        => min: 0.00036644935607910156 || mean: 0.008951559738510565 || max: 0.10788345336914062
====================================================================================================
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EVALUATION COMPLETE !!
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# Mean Reward : -5167.23
# Sum Normalized Reward : 20.058875800849986 (primary score)
# Mean Percentage Complete : 0.753 (secondary score)
# Mean Normalized Reward : 0.66863
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