Singletons Update

[Abstract45]

Added private initializer method for singleton and an alternative method for creating a singleton. Previously you could initialize the class using its default initializer i.e. let x = MyClass() and use its methods.

[timvermeulen]

I much prefer the alternative way that you provided over the original way. It just seems pointless to make a private variable if you don't need to. @iwasrobbed, what do you think?

[iwasrobbed]

@MiWand @timvermeulen Indeed, the updated way is preferred with static let these days, so I'd rather just remove the old way entirely.

Also @MiWand can you please make sure to indent the code examples to keep them looking clean ✨

[Abstract45]

Ok will do in the future 👍

[iwasrobbed]

Rolled into ac7293a