Update README.md

Author: ggeerraarrdd

README.md

@@ -40,13 +40,15 @@ More screenshots below.
 * [Getting Started](#getting-started)
   * [Dependencies](#dependencies)
   * [Installation](#installation)
+  * [Configuration](#configuration)
   * [Usage](#usage)
 * [Author(s)](#authors)
 * [Version History](#version-history)
   * [Release Notes](#release-notes)
   * [Initial Release](#initial-release)
 * [Future Work](#future-work)
 * [License](#license)
+* [Contributing](#contributing)
 * [Acknowledgments](#acknowledgments)
 * [Screenshots](#screenshots)