require automake 1.7 in condifure.in; update all Makefile.am: add comments,

replace obsoleted INCLUDES by AM_CPPFLAGS

clients/examples/Makefile.am

@@ -1,2 +1,7 @@
-bin_SCRIPTS = fortune.pl iosock.pl tail.pl x11amp.pl 
-EXTRA_DIST = fortune.pl iosock.pl tail.pl x11amp.pl 
+## Process this file with automake to produce Makefile.in
+
+bin_SCRIPTS = fortune.pl iosock.pl tail.pl x11amp.pl
+
+EXTRA_DIST = fortune.pl iosock.pl tail.pl x11amp.pl
+
+## EOF