screenshot preview on landing page

src/main/java/com/commafeed/frontend/pages/WelcomePage.html

@@ -14,7 +14,12 @@
 				<h4 class="text-center">
 					CommaFeed is a bloat-free feed reader. It aims to replace Google Reader while keeping things simple.
 					<br />
-					<a wicket:id="demo-login">Try out the demo.</a>
+					<a wicket:id="demo-login">
+						<img src="images/preview.png" class="preview" />
+						<br />
+						Try out the demo.
+					</a>
+					
 				</h4>
 			</div>
 			<div class="row">

src/main/webapp/sass/generic/_misc.scss

@@ -15,6 +15,10 @@
 	margin: 20px 0 40px 0;
 }
 
+.welcome .preview {
+	margin: 40px 0 20px 0;
+}
+
 .main .spinner {
 	display: inline-block;
 	margin-left: 11px;