Add hero link panels for curriculum links

Author: jordanmccullough

_includes/top.html

@@ -33,33 +33,36 @@ <h2>{{ page.title }}</h2>
 
 
 		{% if page.body_class == "home" %}
-			<div class="jumbotron colorful">
+			<div class="jumbotron colorful classes">
 				<div class="container text-center">
 
 					<p>Open source training content. Present your way to better version control.</p>
 
 					<div class="row">
 						<div class="col-md-4">
-							<a href="foundations/beta.html">
-								<div class="well">
+							<a href="foundations/">
+								<div class="panel">
+									<span class="octicon octicon-plug"></span>
 									<h4>Foundations</h4>
 									<p>Core skills for day-to-day use of Git on the command line and GitHub workflows</p>
 								</div>
 							</a>
 						</div>
 
 						<div class="col-md-4">
-							<a href="intermediate/beta.html">
-								<div class="well">
+							<a href="intermediate/">
+								<div class="panel">
+									<span class="octicon octicon-terminal"></span>
 									<h4>Intermediate</h4>
 									<p>Important command line skills and problem solving processes</p>
 								</div>
 							</a>
 						</div>
 
 						<div class="col-md-4">
-							<a href="advanced/beta.html">
-								<div class="well">
+							<a href="advanced/">
+								<div class="panel">
+									<span class="octicon octicon-microscope"></span>
 									<h4>Advanced</h4>
 									<p>Command line deep dive, problem solving techniques, and GitHub efficiencies</p>
 								</div>