Ogg files need a re-record

[flibitijibibo]

Not necessarily a problem with the code, but it's worth noting.

The audio/music files used in Open Hexagon clip like crazy, as seen here:

http://www.flibitijibibo.com/yeahno.png

For some audio backends this is fine, but for Linux in particular this will cause all kinds of crackling/popping with SFML2's use of libsndfile.

Here's the SFML bug: SFML/SFML#310

The solution is to get copies of the songs that are more careful with gain (as long as it doesn't clip over 1.0, you should be all set).

[vittorioromeo]

I've edited the files with adobe audition to automatically normalize the gain. It's not as good as a well-recorded file, so I also asked BOSSFIGHT for normalized version of their songs. Until they reply, I hope the current solution is good enough.

I'm closing the issue, but if there's something wrong with my solution feel free to comment and I'll open it again.