Activex plugin now builds again for windows. Commits: f1582740 and 03b85ce3 broke building of the plugin on windows.

 It is now respected. It is part of the privacy problem with
meta data/art.
 I think that
  --noauto-preparse --album-art 0
 will workaround the issue until a new option is added.

The codec defined will only be used by encoder to force one of the types.

es_format_t::i_codec will be the codec from vlc_fourcc.h
es_format_t::i_original_fourcc will contains the original fourcc
value.

This allows to simplify the decoder/packetizer and every sout modules.

 There will be some regressions, I used automatic sed replacement with manual
checks but there was a lot to change.
 It's only the first pass.

It introduces a bunch of VLC_CODEC_* defines as a representative
fourcc for a codec. The fourccs have been chosen pretty much randomly
except when I knew well know ones.

It adds two helpers: vlc_fourcc_GetCodec and vlc_fourcc_GetDescription.

Don't hesitate if you have any comments.

Conflicts:
	include/vlc/deprecated.h
	src/control/video.c
	src/libvlc.sym