GoodRouter, the rust edition

A good router should:

• [x] work in a server or a client (or any other) environment
• [x] be able to construct routes based on their name
• [x] should have a simple API!
• [x] not do the actual navigation!
• [x] be framework agnostic
• [x] be very minimal and simple!

Example

```rust let mut router = Router::new();

router.insertroute("all-products", "/product/all"); router.insertroute("product-detail", "/product/{id}");

// And now we can parse routes!

{ let route = router.parseroute("/not-found".toowned(),); assert_eq!(route, None); }

{ let route = router.parseroute("/product/all".toowned(),); asserteq!(route, Some(Route{ name: "all-products".toowned(), parameters: vec![], })); }

{ let route = router.parseroute("/product/1".toowned(),); asserteq!(route, Some(Route{ name: "product-detail".toowned(), parameters: vec![ ("id", "1"), ], })); }

// And we can stringify routes

{ let path = router.stringifyroute(Some(Route{ name: "all-products".toowned(), parameters: vec![], })); asserteq!(path, "/product/all".toowned(),); }

{ let path = router.stringifyroute(Some(Route{ name: "product-detail".toowned(), parameters: vec![ ("id", "1"), ], })); asserteq!(path, "/product/2".toowned()); } ```