added github guide link

Author: gkiar

index.html

@@ -150,10 +150,8 @@ <h2>tools to help</h2>
 	<section id="github1" data-background="img/bg.png">
 		<section id="github" data-background="img/bg.png">
 			<h2>Github</h2>
-				<ul>
-					<li>Github</li>
-					<li>Zenodo</li>
-				</ul>
+			<p>... has a great <a href="https://guides.github.com/">getting started</a> guide</p>
+			<p>Before jumping in, we'll quickly demonstrate Github as a solution for our problem</p>
 		</section>
 	</section>
 	<section id="challenge1" data-background="img/bg.png">