Add libyu credit.
Fix wrong argument of getMinBufferSize.
Add log.
Align width, height to 16. Fix of Nexus7 crash.

libvpx crash when the width or height are not align to 16.

At
jni/libvpx/vp8/encoder/lookahead.cvp8_lookahead_init, ctx->buf initialise with 16 align width and height.

but  at
jni/libvpx/vp8/common/extend.cvp8_copy_and_extend_frame
dat is the buf that is allocated at above function, but src seems the same as passed width and height.

I don't know whether this is bug or by design. But anyway the final result would be aligned. So I just aligned input parameter and passed but size.
Performance improvement and audio jump fix. Add more buffer size for AudioRecord.