Rockbox

This patch adds support for NSF (Nintendo songs) playlists, as generated by Winamp. Each .nsf file has multiple tracks in it, and a playlist allows Rockbox to select one of those tracks per playlist entry. Therefore you can now have all the individual tracks of all of your .nsf files listed in a playlist, and randomize between them, or whatever. Basically it lets you treat each track as a separate song, as you can do with other file types. THIS WORKS BEST WITH .NSFE files, not .NSF

File format is as follows:
For track 4 of Zelda.nsf, the entry would be:
nsf://4:/pathto/Zelda.nsf (note lowercase "nsf")
specifically, in my directory setup it looks like this:
nsf://4:/NES/Zelda.nsfe

To create such a list in Winamp, you must add support for NSF files, add an NSF file to your playlist and do File Info and hit Shadow -> Winamp or Shadow -> File. This will create the entries in the playlist for each track. You can then save the playlist and make sure the paths are okay for your Rockbox setup.

Todo:
Figure out how to get a non-magic number (array size) in playlist.h
Possibly increase the codecs.h API version (not sure what this does to the rest of the code)
(probably a separate patch) Make Rockbox load each .nsf as its constituent tracks, rather than one playlist entry that you FF or REW through.