Refactor to allow ytfeed an installer

examples/installation-helper

@@ -1,19 +1,23 @@
-#!./menu
+#!usr/bin/env menu
 
 $ echo Hello, world.
-
+# ^^^ Text   VVV Command
 	echo Hello, world.
 
 $ cat Makefile
-
+# And this is the Attributes line, which is yet unused.
 	cat Makefile
 
-$ less <menu.rs
+$ cat examples/installation-helper
+# Technically this line is skipped entirely by menu(1).
+	cat examples/installation-helper
 
+$ less <menu.rs
+# But comments will be allowed here, they'll start with hash.
 	less <menu.rs
 
 Remove menu and re-build it.
-
+# Don't start the attributes line with a tab; it'll break in later versions.
 	rm -f menu; make
 
 Install menu to /usr/local/ (assuming adequate permissions).
@@ -34,4 +38,4 @@ Uninstall menu from /usr/local (using sudo(8)).
 
 Open the ytfeed launcher.
 
-	make -C examples -f Makefile.ytfeed
+	make -C examples -f Makefile.ytfeed launcher