Added support for more characters in the lyric tracks (#112)

* Added support for undertie character

Parses '§' in the midi track to '‿'

* Adding UTF-8 Encoding

This allow for accented characters in lyric tracks (changed from just ASCII)

* Added the Undertie glyph to the lyric track font

This font didn't have the undertie (U+203F) glyph in it so I slapped in both and had to regenerate the font atlases. Taken from Gnu's freefont.