refactor and clean code

[IronException]

refactor all friendliness and values to values. And refactor all references to players or persons to one word. IMO it should be players but IDK why we started with persons...?

clean code meaning the things I learned in uni:

• operations don't return anything.
• functions return something but don't change anything about the class.
• functions return final objects unless they shouldn't be.
• methods are maximum about 10 lines long
• everything is final that shouldn't be changed (like every parameter)
• description for every method
• names that explain themself
• max letters per line
• maybe requirements and ensures for every method
• maybe class requirements for every class
• maybe loop requirements for every loop

feel free to add points or discuss their importance :)

[barismutan]

Hello, if this issue is still open; can you please assign it to me?