Added Ziik.io theme (#171)

data/themes.yml

@@ -215,3 +215,4 @@
 - { colors: '#8C1D40,#5C6670,#FFC627,#FFFFFF,#5C6670,#FFFFFF,#94E864,#00A3E0', name: 'Arizona State University' }
 - { colors: '#BF5700,#333F48,#FFFFFF,#333F48,#333F48,#FFFFFF,#94E864,#00A3E0', name: 'University Of Texas' }
 - { colors: '#342624,#000000,#EC5614,#FFFFFF,#7C7E7C,#FFFFFF,#EC5614,#EC5614', name: 'Cleveland Browns' }
+- { colors: '#DEE2E6,#ffffff,#0279f9,#FFFFFF,#ffffff,#37393c,#0279f9,#0279F9', name: 'Ziik.io' }