Added new stream_out record module.

The record module:

- automatically selects the right muxer and filename extension by
looking the ES codec. In case it fails, it probes directly the
muxers and keeps the better one.

- removes all ES packets until the first key frame.

- truncates the ES without key frame to match the start time of
the other tracks.

modules/stream_out/Modules.am

@@ -11,6 +11,7 @@ SOURCES_stream_out_switcher = switcher.c
 SOURCES_stream_out_bridge = bridge.c
 SOURCES_stream_out_mosaic_bridge = mosaic_bridge.c
 SOURCES_stream_out_autodel = autodel.c
+SOURCES_stream_out_record = record.c
 
 libvlc_LTLIBRARIES += \
 	libstream_out_dummy_plugin.la \
@@ -24,6 +25,7 @@ libvlc_LTLIBRARIES += \
 	libstream_out_bridge_plugin.la \
 	libstream_out_mosaic_bridge_plugin.la \
 	libstream_out_autodel_plugin.la \
+	libstream_out_record_plugin.la \
 	$(NULL)
 
 if HAVE_LIBGCRYPT