Added convenient shortcut for HEAD

router.go

diff --git a/router.go b/router.go
index 5c0a99b..1c31bdb 100644
--- a/router.go
+++ b/router.go
@@ -134,6 +134,11 @@
 	r.Handle("GET", path, handle)
 }
 
+// HEAD is a shortcut for router.Handle("HEAD", path, handle)
+func (r *Router) HEAD(path string, handle Handle) {
+	r.Handle("HEAD", path, handle)
+}
+
 // POST is a shortcut for router.Handle("POST", path, handle)
 func (r *Router) POST(path string, handle Handle) {
 	r.Handle("POST", path, handle)

router_test.go

diff --git a/router_test.go b/router_test.go
index 0298a5e..bb8aa02 100644
--- a/router_test.go
+++ b/router_test.go
@@ -52,12 +52,15 @@
 }
 
 func TestRouterAPI(t *testing.T) {
-	var get, post, put, patch, delete, handlerFunc bool
+	var get, head, post, put, patch, delete, handlerFunc bool
 
 	router := New()
 	router.GET("/GET", func(w http.ResponseWriter, r *http.Request, _ map[string]string) {
 		get = true
 	})
+	router.HEAD("/GET", func(w http.ResponseWriter, r *http.Request, _ map[string]string) {
+		head = true
+	})
 	router.POST("/POST", func(w http.ResponseWriter, r *http.Request, _ map[string]string) {
 		post = true
 	})
@@ -82,6 +85,12 @@
 		t.Error("routing GET failed")
 	}
 
+	r, _ = http.NewRequest("HEAD", "/GET", nil)
+	router.ServeHTTP(w, r)
+	if !head {
+		t.Error("routing HEAD failed")
+	}
+
 	r, _ = http.NewRequest("POST", "/POST", nil)
 	router.ServeHTTP(w, r)
 	if !post {