Revert "smackaud: clip output samples"

Smacker audio uses overflows instead of clipping.

This reverts commit 375ca0aca81be2951d9ba4731196e70e490d3cdf.
smacker: fix off-by-one error in palette expanding code
matroskadec: silently skip CodecState element.

mkvmerge apparrently uses it for mpeg1/2 video, but it contains the same
information as CodecPrivate, so it can be ignored.
avconv: make -aspect work with streamcopy
configure: make jack depend on pthreads
smacker: add a clarification notice about audio decoding
Merge commit '5f30c6c8ed1f006c1b3a547dfe388f3a4a080e4d'

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '564b7e0c0095768cd20001b28154d69462be54e7'

* commit '564b7e0c0095768cd20001b28154d69462be54e7':
  matroskadec: silently skip CodecState element.
  smacker: fix off-by-one error in palette expanding code

Conflicts:
	libavformat/smacker.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '538bf767373f176b6487e30181155e74b37cced6'

* commit '538bf767373f176b6487e30181155e74b37cced6':
  avconv: make -aspect work with streamcopy

Conflicts:
	ffmpeg.c
	ffmpeg_opt.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  smacker: add a clarification notice about audio decoding
  configure: make jack depend on pthreads

Conflicts:
	configure

Merged-by: Michael Niedermayer <michaelni@gmx.at>
jpeg2000dwt: remove floats from mixed float/int 9/7 dwt

This should fix some fate failures

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
jpeg2000dwt: add float based 9/7 dwt

Untested as theres no code yet using it in the encoder.
Code based on mixed float/int dwt

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>