Update code_guide.md

Author: Connor Turland

code_guide.md

@@ -3,7 +3,7 @@ Junto is currently a single page web application. It all gets loaded into the we
 
 Index.html file is served by a node.js webserver. 
 
-Junto is all about presence. And presence happens in realtime. So Junto uses two services for realtime data. The node.js hosts a websockets (socket.io) server that does two things: it is a [http://www.html5rocks.com/en/tutorials/webrtc/infrastructure/](signaling server) and also hosts data that is only transiently relevant to the application (such as how many users are currently online) 
+Junto is all about presence. And presence happens in realtime. So Junto uses two services for realtime data. The node.js hosts a websockets (socket.io) server that does two things: it is a [signaling server](http://www.html5rocks.com/en/tutorials/webrtc/infrastructure) and also hosts data that is only transiently relevant to the application (such as how many users are currently online) 
 
 
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