annotate CITATION @ 1315:ed3009a50f81 piper

Make SVDEBUG always write to a log file -- formerly this was disabled in NDEBUG builds. I think there's little use to that, it just means that we keep adding more cerr debug output because we aren't getting the log we need. And SVDEBUG logging is not usually used in tight loops, I don't think the performance overhead is too serious.

Also update the About box.

If you are using Sonic Visualiser in research work for publication,
please cite:

@InProceedings{SonicVisualiser,
  author =    {C. Cannam and C. Landone and M. Sandler},
  title =     {Sonic Visualiser: An Open Source Application for Viewing, Analysing, and Annotating Music Audio Files},
  pages =     {1467--1468},
  booktitle = {Proceedings of the ACM Multimedia 2010 International Conference},
  month =     {October},
  year =      {2010},
  address =   {Firenze, Italy},
}