Added redirect method

Context.go

@@ -16,6 +16,7 @@ type Context interface {
 	File(string) error
 	Get(string) string
 	Next() error
+	Redirect(int, string) error
 	Request() Request
 	Response() Response
 	Status(int) Context
@@ -94,6 +95,13 @@ func (ctx *ctx) Response() Response {
 	return &ctx.response
 }
 
+// Redirect sets the Location header and writes the headers with the given status code.
+func (ctx *ctx) Redirect(code int, url string) error {
+	ctx.Response().SetHeader("Location", url)
+	ctx.Status(code)
+	return nil
+}
+
 // Status sets the HTTP status of the response.
 func (ctx *ctx) Status(status int) Context {
 	ctx.response.WriteHeader(status)