Switch to dep for dependency management

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

@@ -1,9 +1,12 @@
+// Copyright 2017 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 (
-	"net/http"
-)
+import "net/http"
 
+// CreateTestContext returns a fresh engine and context for testing purposes
 func CreateTestContext(w http.ResponseWriter) (c *Context, r *Engine) {
 	r = New()
 	c = r.allocateContext()