Update repo to work with gymnasium#3

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elliottower wants to merge 5 commits intofrankilepro:masterfrom

elliottower:gymnasium

Commits on Feb 11, 2023

Added working requirements.txt, play_custom.py file with example of custom defined game settings (from README)
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Relaxed requirements.txt to only include hard coded versions for opencv-python, tensorflow, gym (all which resulted in errors/were unable to install with newest version)
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Put custom env import to end of __init__ import statement to be nondestructive compared to original file, updated custom env settings to match README
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Commits on Feb 14, 2023

commit what is not the .c files
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Updated repo to work with gymnasium (0.27.1) rather than gym
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