Pregap handling in opusenc, proper ending of audio read in opusenc
Resampling on the decoder side
Basic resampling support in the encoder
Bringing in the Speex resampler (not used yet)
Properly determine the frame size in opusdec
Remove the rest of skeleton support from opusenc
Decoder code updated to Opus
Header handlign code (completely untested)
Copying opusenc/opusdec from celtenc/celtdec