Added Pittsburgh Penguins theme

Let's go Pens!

data/themes.yml

@@ -105,3 +105,4 @@
 - { colors: '#212121,#212121,#3F51B5,#FFFFFF,#3F51B5,#FFFFFF,#3F51B5,#3F51B5', name: 'Material Dark Indigo' }
 - { colors: '#212121,#212121,#607D8B,#FFFFFF,#607D8B,#FFFFFF,#607D8B,#607D8B', name: 'Material Dark Blue Grey' }
 - { colors: '#2F343B,#2F343B,#FD7532,#FFFFFF,#FD7532,#FFFFFF,#FD7532,#FD7532', name: 'Hummingbird' }
+- { colors: '#CEC18A,#ffffff,#000000,#FFFFFF,#FFFFFF,#000000,#ffff00,#000000', name: 'Pittsburgh Penguins' }