exe/textbringer in textbringer-0.3.2 vs exe/textbringer in textbringer-1.0.0

@@ -13,9 +13,14 @@
   end
 end
 
 $VERBOSE = nil
 
+unless STDIN.tty?
+  STDERR.puts("textbringer: standard input is not a tty")
+  exit 1
+end
+
 Controller.current = Controller.new
 begin
   Window.start do
     begin
       Plugin.load_plugins