[Vorbis] Lancer 20060506 is out

[pub at cyanet.jp]

Lancer 20060506 (based on aoTuV 4.51)
http://homepage3.nifty.com/blacksword/

Changes:
* oggenc2 updates to 2.83
* in mapping_forward, OpenMP'd multithreading code for each channel is
  introduced
* optimize FFT in n = 256 to 4096(multithreading tweak, faster at 16KHz
  or q < 0)