update vendor-directory

Author: steevehook

.gitignore

@@ -1,5 +1,4 @@
 .DS_Store
 .idea/
 **/vendor
-!vendor-directory/basic-vendor/vendor/
-!vendor-directory/basic-vendor/vendor/github.com/anonymous/nested/vendor/
+!vendor-directory/vendor/

vendor-directory/README.md

@@ -1,5 +1,17 @@
 # `vendor` directory in Go
 
+## Overview
+
+In this section we'll be talking about the `vendor` directory feature
+in Go.
+
+Since `Go 1.5`, the Go team decided to make our life easier and allow the
+community to develop package managers, so we all enjoy downloading
+and installing specific locked versions of software, without
+breaking our precious applications.
+
+By the end of this tutorial you will perfectly know what the `vendor`
+directory is Go and how to make use of it.
 
 ## Medium version 📖