A library to quickly get the live/total/max counts of allocated instances.

```rust

[derive(Default)]

struct Widget { _t: countme::Token, }

impl countme::CountMe for Widget { fn store() -> &'static countme::Store { static S: countme::Store = countme::Store::new(); &S } }

let w1 = Widget::default(); let w2 = Widget::default(); let w3 = Widget::default(); drop(w1);

let counts = countme::get::(); asserteq!(counts.live, 2); asserteq!(counts.max, 3); assert_eq!(counts.total, 3); ```