is ready for wider correctness testing; no substantial issues
expected.


svn path=/trunk/vorbis/; revision=7037

All sample rates/modes with fresh training now in CVS.

(Training run must now be thoroughly tested)

Floor1 divide by zero bugfix
added option for modern PowerPC optimization to configure.in
more comments in examples/encoder_example.c

svn path=/trunk/vorbis/; revision=3574

new ectl calls for lowpass and impulse block tweaking

fix some accidentally untrained books for mid/high rate stereo

add 44kHz mono modes (32kHz - 280kHz)

tone down bass ATH to avoid stressing floor

svn path=/trunk/vorbis/; revision=3463