Encrypted messages

Added modified font holder to handle rendering numbers using a custom
font. Numbers do not resemble any method of representing numbers.
This new font holder can also 'encode' a string into a list of numbers
for the renderer it has, currently it only handles a-z characters, but
could support all characters.
Things to consider: String encoding for different languages may be
problematic, should I only support english or do a different message
style altogether?