add readitlater plugin

js/readitlater_button.js

@@ -0,0 +1,31 @@
+	function readArticleLater(id) {
+	try {
+		var query = "?op=rpc&method=buttonPlugin&plugin=readitlater&plugin_method=getInfo&id=" + param_escape(id);
+
+		console.log(query);
+
+		var d = new Date();
+      var ts = d.getTime();
+
+		var w = window.open('backend.php?op=backend&method=loading', 'ttrss_tweet',
+			"status=0,toolbar=0,location=0,width=500,height=400,scrollbars=1,menubar=0");
+
+		new Ajax.Request("backend.php",	{
+			parameters: query,
+			onComplete: function(transport) {
+				var ti = JSON.parse(transport.responseText);
+
+				var share_url = "https://readitlaterlist.com/save?" +
+					"&title=" + param_escape(ti.title) +
+					"&url=" + param_escape(ti.link);
+
+				w.location.href = share_url;
+
+			} });
+
+
+	} catch (e) {
+		exception_error("tweetArticle", e);
+	}
+	}
+