Bugfixed history logic, example tweaks

examples/timers.php

@@ -6,16 +6,22 @@ require_once __DIR__."/../vendor/autoload.php";
 
 $shell = new NoccyLabs\React\Shell\Shell();
 
+// The prompt event is invoked before every full redraw. Call redrawPrompt()
+// to trigger it manually. Set the prompt or the style here.
 $shell->on('prompt', function ($shell) { 
     $shell->setPrompt(date("H:i:s> ")); 
 });
+
+// Input handler, parse the commands.
 $shell->on('input', function (array $input) use ($shell) {
     $shell->write("You entered: ".join(" ", $input)."\n");
 });
 
-// The shell is an OutputStream
+// The shell is an OutputStream, and writing to it will handle hiding the prompt
+// and redrawing it afterwards!
 $shell->write("Hello World!\n\n");
 
+// So output can be writen while you are typing!
 Loop::addPeriodicTimer(5, function () use ($shell) {
     $shell->write(date(DATE_ATOM)."\n");
 });