Fonts by Abraham

I've added a bunch of new music fonts that are 100% compatible with LilyPond. I've also included stylesheets to make them easier to use via the standard ``\include`` statement. I've also added licenses for each font, along with a README wherever I felt it would be useful.

I removed ``*.pdf`` so that I could include some immediately downloadable files for others' reference.

If you could please review and merge the commits, that would be awesome!

-Abraham