Add signal and stdin examples

examples/basic/signals.php

@@ -0,0 +1,15 @@
+#!/usr/bin/env php
+<?php
+
+require __DIR__ . '/../../vendor/autoload.php';
+
+use Amp\Loop;
+
+print "Press Ctrl+C to exit..." . PHP_EOL;
+
+Loop::onSignal(SIGINT, function () {
+    print "Caught SIGINT, exiting..." . PHP_EOL;
+    exit(0);
+});
+
+Loop::run();

examples/basic/stdin.php

@@ -0,0 +1,21 @@
+#!/usr/bin/env php
+<?php
+
+require __DIR__ . '/../../vendor/autoload.php';
+
+use Amp\Loop;
+
+if (stream_set_blocking(STDIN, false) !== true) {
+    fwrite(STDERR, "Unable to set STDIN to non-blocking" . PHP_EOL);
+    exit(1);
+}
+
+print "Write something and hit enter" . PHP_EOL;
+
+Loop::onReadable(STDIN, function ($watcher, $stream) {
+    $chunk = fread($stream, 8192);
+
+    print "Read " . strlen($chunk) . " bytes" . PHP_EOL;
+});
+
+Loop::run();