`f . x` is the same as `f x`, and is mostly useful when used as an argument to another function call.
this allows us to simulate record field syntax very well: `d.Num` is the same as `d Num`, but with high precedence
`a |f b` is the same as `f a b` and effectively allows you to turn any function into an arithmetic operator.
it's the main reason behind + - * / having the same precedence---they now chain very nicely with pipes
closes#126 (`|` operator)
closes#127 (`.` operator)