added merchant; exchanges; updated blogpost

_data/exchanges.yml

@@ -264,3 +264,15 @@
   fees: N/A
   image: yobit_logo.png
   url: https://yobit.net
+
+- name: Wall of coin
+  trading_pairs: BTC
+  fees: N/A
+  image: woc_logo.png
+  url: https://wallofcoins.com/en/
+
+- name: Changelly
+  trading_pairs: BTC
+  fees: N/A
+  image: changelly_logo.png
+  url: https://wallofcoins.com/en/

_data/merchants-stores.yml

@@ -144,3 +144,7 @@
   url: http://www.buywithdash.org
   image: Buywithdash.jpg
 
+- name: CryptoCoffee
+  title: Crypto Coffee
+  url: https://crypto-coffee.com/
+  image: CryptoCoffee.jpg