Adding minimal namespace

To use this style add the "minimal" css-class to body
Initial Comit of modified "Normal" Version

    * Changing Readme Information
    * Removing Download buttons from index.html
    * Adding Custom Menu to index.html
Removing download button css from styles.css
Adding custom menu styles
Adding small style customizations
Updating copyright notices

Squashed commits:
    * Updationg copyright notices
    * Update README.md
Changing namespacing from "minimal" to "minimal-dark"

Squashed commits:
    * Adding namespacing of minimal-dark
    * Namespacing pygment styles
Recolored to dark version