Add reveal-override.css

Fix image handling in the "white" theme so that it doesn't draw an
ugly black border and box shadow around each image, making it look
like an obituary.

Author: fghaas

itnot/css/reveal-override.css

@@ -0,0 +1,21 @@
+/* This file is linked from index.html, and should include any CSS
+   overrides that you want to apply to your selected reveal.js
+   "white" theme.
+*/
+
+.reveal {
+    h3, h4, h5, h6 {
+	text-transform: none;
+    }
+
+    .hidden {
+	display: none !important;
+    }
+
+    section {
+	img {
+	    border: none;
+	    box-shadow: none;
+	}
+    }
+}

itnot/css/reveal-override.scss

@@ -8,6 +8,7 @@
 
 		<link rel="stylesheet" href="css/reveal.css">
 		<link rel="stylesheet" href="css/theme/white.css">
+		<link rel="stylesheet" href="css/reveal-override.css">
 
 		<!-- Theme used for syntax highlighting of code -->
 		<link rel="stylesheet" href="lib/css/zenburn.css">