Merge pull request #20 from Fil/master

reveal.js was failing when the hash was of an unexpected format

js/reveal.js

@@ -528,8 +528,8 @@ var Reveal = (function(){
 		var bits = window.location.hash.slice(2).split('/');
 		
 		// Read the index components of the hash
-		indexh = bits[0] ? parseInt( bits[0] ) : 0;
-		indexv = bits[1] ? parseInt( bits[1] ) : 0;
+		indexh = parseInt( bits[0] ) || 0 ;
+		indexv = parseInt( bits[1] ) || 0 ;
 		
 		navigateTo( indexh, indexv );
 	}