Break out track and disc routines. (Disc needs more work)

Add more convenience track routines.
Set access-mode for image routines to be the image drivers - for uniformity.
Some name regularization.
And we're in 2005 now.

include/cdio/Makefile.am

@@ -1,4 +1,4 @@
-#   $Id: Makefile.am,v 1.16 2004/12/31 05:47:36 rocky Exp $
+#   $Id: Makefile.am,v 1.17 2005/01/04 04:33:36 rocky Exp $
 #
 #    Copyright (C) 2003, 2004 Rocky Bernstein <rocky@panix.com>
 #
@@ -31,6 +31,7 @@ libcdioinclude_HEADERS = \
 	cdtext.h \
 	cdtext.h \
 	cd_types.h \
+	disc.h \
 	ds.h \
 	dvd.h \
 	iso9660.h \