Added IconStore

Added IconStore a collection of SVG & sourcefiles icons

README.md

@@ -226,6 +226,7 @@ A collection for icon font resources, most of which also include SVGs, which can
 * [Foundation Icon Fonts 3](https://zurb.com/playground/foundation-icon-fonts-3) - [:copyright:](https://choosealicense.com/licenses/mit/) An icon font from Zurb, the people behind the Foundation framework.
 * [IcoMoon](https://icomoon.io/) - [:copyright:](https://creativecommons.org/licenses/by/4.0/) Custom built and crisp icon fonts, done right.
 * [Ionicons](http://ionicons.com/) - [:copyright:](https://choosealicense.com/licenses/mit/) The premium icon font for Ionic Framework. 100% free and open source.
+* [Iconstore](https://iconstore.co/) - [:copyright:](https://iconstore.co/license/) Free Icons by First-Class Designers.
 * [Ligature Symbols](http://kudakurage.com/ligature_symbols/) - [:copyright:](http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=OFL&_sc=1) Really clean icon set inlcuding all major topics.
 * [Linea](http://www.linea.io/) - [:copyright:](https://creativecommons.org/licenses/by/4.0/) A free outline iconset featuring 730+ Icons.
 * [Material Design Icons](https://material.io/icons/) - [:copyright:](https://creativecommons.org/licenses/by/4.0/) Google's Material Icons.