time resource for specs
```rust extern crate specs; extern crate specsbundler; extern crate specstime;
use specs::{DispatcherBuilder, World}; use specsbundler::Bundler; use specstime::{Time, TimeBundle}; use std::{thread, time};
fn main() { let mut world = World::empty();
let mut dispatcher = Bundler::new(&mut world, DispatcherBuilder::new())
.bundle(TimeBundle::<f64>::default())
.unwrap()
.build();
for _ in 0..60 {
dispatcher.dispatch(&world);
thread::sleep(time::Duration::from_millis(16));
}
let time = world.fetch::<Time<f64>>();
println!("{:?}", *time);
} ```