Modify googlereaderkeys plugin with mark unread toggle.

plugins/googlereaderkeys/init.php

@@ -25,6 +25,7 @@ class GoogleReaderKeys extends Plugin {
 		$hotkeys["*p"]		= "prev_feed";
 		$hotkeys["v"]		= "open_in_new_window";
 		$hotkeys["r"]		= "feed_refresh";
+		$hotkeys["m"]		= "toggle_unread";
 		$hotkeys["(32)|space"]	= "next_article";
 		$hotkeys["(38)|up"]	= "article_scroll_up";
 		$hotkeys["(40)|down"]	= "article_scroll_down";