Bug#775445: License updates, music included, ready for review (I hope)

[D B <buckyballreaction@gmail.com>]

Hi,

After speaking with the author of the menu music, he has licensed it under
CC-BY-3.0.  The latest package reflects this:

http://mentors.debian.net/debian/pool/main/b/bitfighter/bitfighter_019d+dfsg-14.dsc

I also replaced the 'Play' font usage with 'LiberationSans' so it isn't so
ugly (because of bug #776273)

I believe I am read for review again.

Thank you!,
David