Stores
Reducable stores inspired by Redux
```rust
struct Counter {
v:u32
}
enum Action{
Increment
}
impl Reduceable for Counter {
fn reduce(state:Arc>,&action:Action) -> Arc>{
let mut s = state.lock();
match action {
_ => {
s.v += 1;
}
}
state.clone()
}
}
fn main() {
let r = Store::::get().lock();
r.watch(|state|{
println!("state changed! {:?}", state);
});
r.dispatch(&Action::Increment);
}
```