Add libvorbis 1.3.3.

libs/libvorbis-1.3.3/win32/VS2008/README

@@ -0,0 +1,16 @@
+libvorbis has libogg as a dependency, you need to have libogg
+compiled beforehand.
+
+Lets say you have libogg and libvorbis in the same directory:
+
+libogg-1.1.3 
+libvorbis-1.2.0
+
+Because there is no automatic library detection you have to,
+either:
+
+1. Rename libogg-1.1.3 to libogg
+
+2. Open libogg.vsprops with a text editor (even notepad.exe
+will suffice) and see if LIBOGG_VERSION is set to the correct
+version, in this case "1.1.3"