simple cookie middleware for Iron
```rust
extern crate cookie; extern crate oven;
use oven::prelude::*;
fn initializemywebapppls() { // do some things, make an iron::Chain... chain.link(oven::new(SUPERSECRETKEYSTHATLETSBEHONESTYOULLPROBABLYACCIDENTALLYPUTIN_GITHUB)); }
fn handlesomerequests(req: &mut Request) {
let foocookie = req.getcookie("foo"); // foo = Option