Add marcosaguayo.com to merchants.yml

Fix #451

_data/merchants.yml

@@ -148,6 +148,8 @@
       url: mailto:[email protected]
     - name: KoDDoS.net - DDoS Protection
       url: https://koddos.net
+    - name: Marcos Aguayo - Programmer and Web Developer
+      url: http://marcosaguayo.com/
     - name: MSvB Hardware Design (using a secure element)
       url: mailto:[email protected]?subject=Monero%20Services%20Hardware%20Design%20Request
     - name: MyMonero Web-based Wallet