feat(UrlMatcher): allow shorthand definitions

When defining parameter configurations, `{ param: "default" }` is now equivalent to `{ param: { value: "default" }}`.

src/urlMatcherFactory.js

@@ -95,7 +95,8 @@ function UrlMatcher(pattern, config) {
 
   function paramConfig(param) {
     if (!config.params || !config.params[param]) return {};
-    return config.params[param];
+    var cfg = config.params[param];
+    return isObject(cfg) ? cfg : { value: cfg };
   }
 
   this.source = pattern;

test/urlMatcherFactorySpec.js

@@ -310,6 +310,13 @@ describe("urlMatcherFactory", function () {
         expect(m.exec('/users/2/bar')).toEqual({ id: 2, test: "bar" });
         expect(m.exec('/users/bar/2')).toBeNull();
       });
+
+      it("should allow shorthand definitions", function() {
+        var m = new UrlMatcher('/foo/:foo', {
+          params: { foo: "bar" }
+        });
+        expect(m.exec("/foo")).toEqual({ foo: "bar" });
+      });
     });
   });