Update README.md

Author: aduguid

README.md

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 # Source Control Export
 
+An Add-In that exports individual files so they can be added/diffed in source control. The only version is currently in VBA/XML ribbon.
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 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE "MIT License Copyright © Anthony Duguid")
 [![Latest Release](https://img.shields.io/github/release/Excel-projects/Excel-Source-Control-Export.svg?label=latest%20release)](https://github.com/Excel-projects/Excel-Source-Control-Export/releases)
 [![Github commits (since latest release)](https://img.shields.io/github/commits-since/Excel-projects/Excel-Source-Control-Export/latest.svg)](https://github.com/Excel-projects/Excel-Source-Control-Export/commits/master)