Add Validation section

Added Validation section for application data validation

README.md

@@ -41,6 +41,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
     - [Text Processing](#text-processing)
     - [Third-party APIs](#third-party-apis)
     - [Utilities](#utilities)
+    - [Validation](#validation)
     - [Version Control](#version-control)
     - [Video](#video)
     - [Web Frameworks](#web-frameworks)
@@ -561,6 +562,13 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 * [xlsx](https://github.com/tealeg/xlsx) - Library to simplify reading the XML format used by recent version of Microsoft Excel in Go programs.
 
 
+## Validation
+
+*Libraries for validation.*
+
+* [go-validate-yourself](https://github.com/joeybloggs/go-validate-yourself) - Go Struct and Field validation
+
+
 ## Version Control
 
 *Libraries for version control.*