add footer for all slides

Signed-off-by: Sean Cross <sean@xobs.io>

css/theme/lca2019.css

@@ -24,6 +24,29 @@ body {
     background-color: #387A3B;
 }
 
+.reveal .footer {
+    position: absolute;
+    bottom: 1em;
+    right: 2em;
+    text-align: right;
+    font-size: 0.5em;
+    width: 100%;
+    height: 96px;
+    background-image: url("lca2019-logo.png");
+    background-repeat: no-repeat;
+    display: flex;
+    justify-content: flex-end;
+    align-items: flex-end;
+}
+
+.reveal .footer .theme {
+    padding-right: 80px;
+}
+
+.reveal .footer .hashtag {
+    padding-right: 80px;
+}
+
 .reveal {
     font-family: "Space Mono", Helvetica, sans-serif;
     font-size: 42px;

index.html

@@ -38,6 +38,9 @@
 
 	<!-- Start of main presentation -->
 	<div class="reveal">
+		<div class="footer">
+			<span class="theme">The Linux of Things</span><span class="hashtag"> | #LCA2019</span><span class="twitter"> | @linuxconfau</span>
+		</div>
 		<div class="slides">
 			<section data-background-image="css/theme/lca2019-title-bg.png">
 				<h2>Plastic is Forever</h2>