Clean version of the new transitions.

css/reveal.scss

@@ -138,50 +138,34 @@ html:-moz-full-screen-ancestor {
 }
 
 .reveal .slides section .fragment.fade-up {
-	opacity: 0;
 	transform: translate(0, 20%);
-	visibility: hidden;
 
 	&.visible {
-		opacity: 1;
 		transform: translate(0, 0);
-		visibility: visible;
 	}
 }
 
 .reveal .slides section .fragment.fade-down {
-	opacity: 0;
 	transform: translate(0, -20%);
-	visibility: hidden;
 
 	&.visible {
-		opacity: 1;
 		transform: translate(0, 0);
-		visibility: visible;
 	}
 }
 
 .reveal .slides section .fragment.fade-right {
-	opacity: 0;
 	transform: translate(-20%, 0);
-	visibility: hidden;
 
 	&.visible {
-		opacity: 1;
 		transform: translate(0, 0);
-		visibility: visible;
 	}
 }
 
 .reveal .slides section .fragment.fade-left {
-	opacity: 0;
 	transform: translate(20%, 0);
-	visibility: hidden;
 
 	&.visible {
-		opacity: 1;
 		transform: translate(0, 0);
-		visibility: visible;
 	}
 }