fix nightly build

closes iron#148

- use patch for route-recognizer
- add `dyn` to trait objects

I guess route-recognizer is no longer maintained? My PR:
http-rs/route-recognizer#25
Comment from Alex Crichton:
http-rs/route-recognizer#26 (comment)

Author: miller-time

Cargo.toml

@@ -13,3 +13,7 @@ keywords = ["iron", "web", "http", "routing", "router"]
 route-recognizer = "0.1"
 iron = { git = "https://github.com/iron/iron", branch = "master" }
 url = "1.1"
+
+[patch.crates-io.route-recognizer]
+git = "https://github.com/miller-time/route-recognizer.rs"
+rev = "d7bc06d2dc58a2c59d8f2cfbee2ab23b8188700d"

src/router.rs

@@ -14,9 +14,9 @@ use recognizer::{Match, Params};
 
 pub struct RouterInner {
     // The routers, specialized by method.
-    pub routers: HashMap<method::Method, Recognizer<Box<Handler>>>,
+    pub routers: HashMap<method::Method, Recognizer<Box<dyn Handler>>>,
     // Routes that accept any method.
-    pub wildcard: Recognizer<Box<Handler>>,
+    pub wildcard: Recognizer<Box<dyn Handler>>,
     // Used in URL generation.
     pub route_ids: HashMap<String, String>
 }
@@ -136,7 +136,7 @@ impl Router {
     }
 
     fn recognize(&self, method: &method::Method, path: &str)
-                     -> Option<Match<&Box<Handler>>> {
+                     -> Option<Match<&Box<dyn Handler>>> {
         self.inner.routers.get(method).and_then(|router| router.recognize(path).ok())
             .or(self.inner.wildcard.recognize(path).ok())
     }