new NSV demuxer

Originally committed as revision 3697 to svn://svn.ffmpeg.org/ffmpeg/trunk

Changelog

@@ -8,6 +8,7 @@ version <next>
 - Miro VideoXL (VIXL) video decoder
 - H.261 video encoder
 - QPEG video decoder
+- Nullsoft Video (NSV) file demuxer
 
 version 0.4.9-pre1:
 

doc/ffmpeg-doc.texi

@@ -686,9 +686,10 @@ library:
 @item Sierra Online    @tab    @tab X
 @tab .sol files used in Sierra Online games
 @item Matroska         @tab    @tab X
-@end multitable
 @item Electronic Arts Multimedia    @tab    @tab X
 @tab used in various EA games; files have extensions like WVE and UV2
+@item Nullsoft Video (NSV) format @tab    @tab X
+@end multitable
 
 @code{X} means that the encoding (resp. decoding) is supported.