Documentation files included in "dist" target.

doc/Makefile.am

 ## Process this file with automake to produce Makefile.in
 
-EXTRA_DIST=doxygen.cfg
+EXTRA_DIST=index.doxygen structure.doxygen usage.doxygen newdec.doxygen \
+           decoder.dot doxygen.cfg
 
 doc:
 	doxygen doxygen.cfg

doc/Makefile.in

@@ -74,7 +74,8 @@ RANLIB = @RANLIB@
 STRIP = @STRIP@
 VERSION = @VERSION@
 
-EXTRA_DIST = doxygen.cfg
+EXTRA_DIST = index.doxygen structure.doxygen usage.doxygen newdec.doxygen            decoder.dot doxygen.cfg
+
 mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
 CONFIG_HEADER = ../src/config.h
 CONFIG_CLEAN_FILES =