add vendor & update README.md

vendor/github.com/gin-gonic/gin/deprecated.go

@@ -0,0 +1,21 @@
+// Copyright 2014 Manu Martinez-Almeida.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package gin
+
+import (
+	"log"
+
+	"github.com/gin-gonic/gin/binding"
+)
+
+// BindWith binds the passed struct pointer using the specified binding engine.
+// See the binding package.
+func (c *Context) BindWith(obj interface{}, b binding.Binding) error {
+	log.Println(`BindWith(\"interface{}, binding.Binding\") error is going to
+	be deprecated, please check issue #662 and either use MustBindWith() if you
+	want HTTP 400 to be automatically returned if any error occur, or use
+	ShouldBindWith() if you need to manage the error.`)
+	return c.MustBindWith(obj, b)
+}