Add a built in reader page with a clipboard hook

reader.html

@@ -0,0 +1,26 @@
+<html>
+<head>
+<title>Text Grabber</title>
+<style>
+body
+{
+    background-color: #111;
+    color: #CCC;
+    font-family: Verdana, Arial, IPAGothic, TakaoGothic, Noto Sans CJK JP Regular, Meiryo, sans-serif;
+    font-size: 1.4em;
+}
+html
+{
+    overflow-y: scroll;
+}
+</style>
+<script src="reader.js"></script>
+</head>
+
+<body lang="ja">
+<p id="helptext"><i>This page grabs from the clipboard automatically if it contains Japanese text. If this page is not opened, Nazeka will never access the clipboard.</i></p>
+<p><i>Use the context menu (right click the page) to toggle Nazeka.</i></p>
+<div style="position:absolute;visibility:hidden"><textarea id="nazeka-paste-target"></textarea></div>
+</body>
+
+</html>