Add Cleveland Browns theme (#176)

* Add Cleveland Browns
* Move new theme to the bottom of the file

data/themes.yml

@@ -214,3 +214,4 @@
 - { colors: '#253346,#434f61,#434f61,#FFFFFF,#434f61,#f4f5f7,#44DB5E,#f72951', name: 'Delta' }
 - { 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' }