Rename ffplay-doc.texi @chapter "Introduction" to "Description", for

consistency with the corresponding man section.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23454 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

doc/ffplay-doc.texi

@@ -8,9 +8,9 @@
 @end titlepage
 
 
-@chapter Introduction
-
+@chapter Description
 @c man begin DESCRIPTION
+
 FFplay is a very simple and portable media player using the FFmpeg
 libraries and the SDL library. It is mostly used as a testbed for the
 various FFmpeg APIs.