Add CodeMash theme

Closes #142

data/themes.yml

@@ -185,3 +185,4 @@
 - { colors: '#1d1f21,#282a2e,#282a2e,#c5c8c6,#282a2e,#c5c8c6,#5f89ac,#5f89ac', name: 'Tomorrow' }
 - { colors: '#eeeeee,#dddddd,#dddddd,#333333,#dddddd,#333333,#ff6600,#ff6600', name: 'Photon' }
 - { colors: '#7d5bbe,#6441a4,#6441a4,#ffffff,#6441a4,#ffffff,#6441a4,#6441a4', name: 'Twitch' }
+- { colors: '#0c84a9,#f67f01,#94C53C,#FFFFFF,#16A1C8,#FFFFFF,#FFFFFF,#94C53C', name: 'CodeMash'}