A minimal library for representing rational numbers (ratios of integers).

Example

```rust // all rationals are automatically reduced when created, so equality works as following: let onehalf = Rational::new(1, 2); let twoquarters = Rational::new(2, 4); asserteq!(onehalf, two_quarters);

// you can make more complicated rationals: let onehalfoveronequarter = Rational::new(Rational::new(1, 2), Rational::new(1, 4)); // (1/2)/(1/4) asserteq!(onehalfoverone_quarter, Rational::new(2, 1));

// mathematical ops are implemented: let sum = Rational::new(1, 9) + Rational::new(5, 4); assert_eq!(sum, Rational::new(2, 3)); ```