* Tell the auhal which channel ordering VLC uses. 7 and 8 channel configs are not supported because VLC uses the channel ordering L R Lm Rm Lr Rr C LFE which isn't a normal ITU, DVD, MPEG, AAC or WAV standard and therefore not supported by default by OS X.

New VLC_EXPORTs are now added at the end of module_symbols_t so that
offsets of other function pointers are preserved.

Deleted VLC_EXPORTs are replaced with dummy pointers for padding.

Of course, it doesn't solve the problem with changing shared structures
format :/ and it may cause SVN conflicts when multiple people changes
VLC_EXPORT. I doubt it can be avoided though.

* Fix several problems with the auhal module. only the problem with the changing inNumberFrames should be left. We need to add a buffer system to take care of this issue...

* Revert the coreaudio resampler to it's simpler variant again. the builtin resampler of the new auhal module takes care of the special case in which this resampler wasn't working. It would be better to really fix it, but i cannot find the problem.

* modules/demux/mp4/mp4.c: we don't need to re-packetize h264 data into annexe B bytestream anymore since new versions of ffmpeg deal with it properly.

* standard.c: sap-ipv6 is no more used

* modules/mux/mpeg/*: add the mpeg4 video VOL data inside EStoPES so it can be used by the PS muxer as well.

	 skip deprecated options

* modules/mux/mpeg/ts.c: proper muxing of ISO/IEC 14496-2 (aka mpeg 4 video) as specified in ISO/IEC 13818-1

* modules/packetizer/mpeg4video.c: remove the VOL from the packetized stream and put it in fmt.p_extra instead.

* modules/codec/ffmpeg/video.c: codec extra data is sometimes not available before the 1 frame is fed to the decoder.

* src/input/decoder.c: check for codec extra data changes when a packetizer is inserted before the decoder.

- automatically select SAP multicast address (closes #141)
- some clean up

   are not multithreaded.