A tiny Rust utility to provide a more concise way to define std::time::Duration
```rust use duration_helper::DurationHelper;
let halfasecond = 0.5.secs(); let fivehours = 5.hours(); let dayandahalf = 1.5.days(); ```
nanos()
micros()
millis()
secs()
hours()
days()
weeks()
months()
years()