Add alberta-man.pdf to EXTRA_DIST.

Makefile.am

@@ -127,21 +127,21 @@ generate-alberta-dist:
 #
 # The documentation is available as book.
 #
-EXTRA_DIST += doc/alberta.pdf
+EXTRA_DIST += doc/alberta-man.pdf
 
 #
 # this one requires write access to the source directory. One day one might
 # want to automakify alberta/doc/ ...
 #
-doc/alberta.ps:
+doc/alberta-man.ps:
 	make -C $(srcdir)/doc/ vclean
-	make -C $(srcdir)/doc/ alberta.ps
+	make -C $(srcdir)/doc/ alberta-man.ps
 
-doc/alberta.pdf:
+doc/alberta-man.pdf:
 	make -C $(srcdir)/doc/ vclean
-	make -C $(srcdir)/doc/ alberta.pdf
+	make -C $(srcdir)/doc/ alberta-man.pdf
 
-documentation: doc/alberta.pdf
+documentation: doc/alberta-man.pdf
 
 
 dist-hook: documentation