Updater update, gameplay update

[DevBoiAgru]

• Changed how missing dependencies are handled
• Added requirements.txt
• Added lift simulation
• Added gravity
• Added updater
• Misc updates and fixes

[HyperSourceGithub]

Never mind, found it. venv is not there, will not be downloaded. still wondering why it's in gitignore though. @DevBoiAgru

[HyperSourceGithub]

Updated updater.py to ensure running in python3.