wscript: no need to check jack version

Signed-off-by: Paul Brossier <piem@piem.org>
wscript: make sure all libav libraries are installed to build source_avcodec

Signed-off-by: Paul Brossier <piem@piem.org>
src/io/sndfileio.{c,h}: remove old sndfile interface

Signed-off-by: Paul Brossier <piem@piem.org>
src/io/source_avcodec.c: remove useless include

Signed-off-by: Paul Brossier <piem@piem.org>
doc/web.cfg: fix typo to really exclude mathutils

Signed-off-by: Paul Brossier <piem@piem.org>
wscript: small tweaks to with mingw32

Signed-off-by: Paul Brossier <piem@piem.org>
src/aubio.h: move audio_unit to unstable

Signed-off-by: Paul Brossier <piem@piem.org>