Add new goods merchant

Project Coral Reef is a listing of new stores accepting Monero as a form of payment

_data/merchants.yml

@@ -223,6 +223,8 @@
       url: http://investmentart.org/
     - name: Mushroom cultures, mushroom growing supplies, seeds
       url: https://www.vesp.co/Fungible
+    - name: Project Coral Reef Store
+      url: http://www.projectcoralreef.com/all-stores
     - name: SecPoint IT Security Products
       url: https://shop.secpoint.com/shop/frontpage.html
     - name: SilverRound.com - Gold and Silver Dealer