diff --git a/.travis.yml b/.travis.yml
index 30ec5d4b..3a6c9f84 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 language: go
 
 go:
+  - tip
   - 1.5.3
   - 1.4.3
   - 1.3.3
@@ -35,3 +36,5 @@ script:
   - go vet -x ./...
   - $HOME/gopath/bin/golint ./...
   - go test -v ./...
+notifications:
+  webhooks: https://hooks.pubu.im/services/z7m9bvybl3rgtg9
diff --git a/config.go b/config.go
index 7e2b3ee7..ffe92f06 100644
--- a/config.go
+++ b/config.go
@@ -319,7 +319,7 @@ func LoadAppConfig(adapterName, configPath string) error {
 	}
 
 	if !utils.FileExists(absConfigPath) {
-		return fmt.Errorf("the target config file: %s don't exist!", configPath)
+		return fmt.Errorf("the target config file: %s don't exist", configPath)
 	}
 
 	if absConfigPath == appConfigPath {
diff --git a/error.go b/error.go
index 94151dd8..4f48fab2 100644
--- a/error.go
+++ b/error.go
@@ -424,6 +424,7 @@ func exception(errCode string, ctx *context.Context) {
 
 func executeError(err *errorInfo, ctx *context.Context, code int) {
 	if err.errorType == errorTypeHandler {
+		ctx.ResponseWriter.WriteHeader(code)
 		err.handler(ctx.ResponseWriter, ctx.Request)
 		return
 	}
diff --git a/grace/server.go b/grace/server.go
index f4512ded..101bda56 100644
--- a/grace/server.go
+++ b/grace/server.go
@@ -90,16 +90,15 @@ func (srv *Server) ListenAndServeTLS(certFile, keyFile string) (err error) {
 		addr = ":https"
 	}
 
-	config := &tls.Config{}
-	if srv.TLSConfig != nil {
-		*config = *srv.TLSConfig
+	if srv.TLSConfig == nil {
+		srv.TLSConfig = &tls.Config{}
 	}
-	if config.NextProtos == nil {
-		config.NextProtos = []string{"http/1.1"}
+	if srv.TLSConfig.NextProtos == nil {
+		srv.TLSConfig.NextProtos = []string{"http/1.1"}
 	}
 
-	config.Certificates = make([]tls.Certificate, 1)
-	config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
+	srv.TLSConfig.Certificates = make([]tls.Certificate, 1)
+	srv.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
 	if err != nil {
 		return
 	}
@@ -113,7 +112,7 @@ func (srv *Server) ListenAndServeTLS(certFile, keyFile string) (err error) {
 	}
 
 	srv.tlsInnerListener = newGraceListener(l, srv)
-	srv.GraceListener = tls.NewListener(srv.tlsInnerListener, config)
+	srv.GraceListener = tls.NewListener(srv.tlsInnerListener, srv.TLSConfig)
 
 	if srv.isChild {
 		process, err := os.FindProcess(os.Getppid())
diff --git a/logs/console.go b/logs/console.go
index 10d8e8b2..d7ed8d8e 100644
--- a/logs/console.go
+++ b/logs/console.go
@@ -48,7 +48,8 @@ var colors = []brush{
 // consoleWriter implements LoggerInterface and writes messages to terminal.
 type consoleWriter struct {
 	lg    *log.Logger
-	Level int `json:"level"`
+	Level int  `json:"level"`
+	Color bool `json:"color"`
 }
 
 // NewConsole create ConsoleWriter returning as LoggerInterface.
@@ -56,6 +57,7 @@ func NewConsole() Logger {
 	cw := &consoleWriter{
 		lg:    log.New(os.Stdout, "", 0),
 		Level: LevelDebug,
+		Color: true,
 	}
 	return cw
 }
@@ -75,7 +77,7 @@ func (c *consoleWriter) WriteMsg(when time.Time, msg string, level int) error {
 		return nil
 	}
 	msg = formatLogTime(when) + msg
-	if runtime.GOOS == "windows" {
+	if runtime.GOOS == "windows" || !c.Color {
 		c.lg.Println(msg)
 		return nil
 	}
diff --git a/logs/console_test.go b/logs/console_test.go
index ce8937d4..04f2bd7e 100644
--- a/logs/console_test.go
+++ b/logs/console_test.go
@@ -42,3 +42,10 @@ func TestConsole(t *testing.T) {
 	log2.SetLogger("console", `{"level":3}`)
 	testConsoleCalls(log2)
 }
+
+// Test console without color
+func TestConsoleNoColor(t *testing.T) {
+	log := NewLogger(100)
+	log.SetLogger("console", `{"color":false}`)
+	testConsoleCalls(log)
+}
diff --git a/orm/types.go b/orm/types.go
index 1c8460b2..41933dd1 100644
--- a/orm/types.go
+++ b/orm/types.go
@@ -148,6 +148,10 @@ type QuerySeter interface {
 	// add OFFSET value
 	// same as Limit function's args[0]
 	Offset(offset interface{}) QuerySeter
+	// add GROUP BY expression
+	// for example:
+	//	qs.GroupBy("id")
+	GroupBy(exprs ...string) QuerySeter
 	// add ORDER expression.
 	// "column" means ASC, "-column" means DESC.
 	// for example:
diff --git a/template.go b/template.go
index 1b62cf78..7a38630e 100644
--- a/template.go
+++ b/template.go
@@ -272,7 +272,9 @@ func SetStaticPath(url string, path string) *App {
 	if !strings.HasPrefix(url, "/") {
 		url = "/" + url
 	}
-	url = strings.TrimRight(url, "/")
+	if url != "/" {
+		url = strings.TrimRight(url, "/")
+	}
 	BConfig.WebConfig.StaticDir[url] = path
 	return BeeApp
 }
@@ -282,7 +284,9 @@ func DelStaticPath(url string) *App {
 	if !strings.HasPrefix(url, "/") {
 		url = "/" + url
 	}
-	url = strings.TrimRight(url, "/")
+	if url != "/" {
+		url = strings.TrimRight(url, "/")
+	}
 	delete(BConfig.WebConfig.StaticDir, url)
 	return BeeApp
 }