add btc ticker for reddit, update readme

Author: neocogent

README

@@ -12,6 +12,7 @@ scripts:
 greasemonkey:
 	collapsetips - script to collapse ChangeTips on /r/bitcoin
 	bitcoinwisdom - script to add USD on Chinese exchanges
+    reddit-btc-ticker - script to add BTC price ticker on /r/bitcoin
 
 from other repos/gists:
 	subgit - nice script for easily managing sub-projects (like these)

greasemonkey/reddit-btc-ticker.js

@@ -0,0 +1,29 @@
+// ==UserScript==
+// @name        Reddit BTC Ticker
+// @namespace   topherkhaew
+// @include     https://www.reddit.com/r/Bitcoin/*
+// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
+// @version     1
+// @grant       GM_xmlhttpRequest
+// ==/UserScript==
+
+function add_btc_price(price) {
+  var btc_css = {
+      "position": "absolute",
+      "top": "60px",
+      "right": "60px",
+      "font-size": "14pt"
+    };
+    var btc = jQuery("<div>"+parseFloat(price).toFixed(2)+"</div>").appendTo("#header");
+    btc.css(btc_css);
+}
+
+GM_xmlhttpRequest ({
+  method: "GET",
+  url: "https://blockchain.info/ticker",
+  onload: function (response) { 
+    data = $.parseJSON(response.responseText);
+    add_btc_price(data['USD']['last']);
+    }
+});
+