Slidy, HTML: Use h2 for author, h3 for date.

Previously, title was h1, author h3, date h4.  There was
no real reason for skipping h2.

default.html

@@ -54,10 +54,10 @@ $else$
 $endif$
 <h1 class="title">$title$</h1>
 $for(author)$
-<h3 class="author">$author$</h3>
+<h2 class="author">$author$</h2>
 $endfor$
 $if(date)$
-<h4 class="date">$date$</h4>
+<h3 class="date">$date$</h3>
 $endif$
 $if(html5)$
 </header>

default.s5

@@ -57,8 +57,8 @@ $endfor$
 $if(title)$
 <div class="slide">
   <h1>$title$</h1>
-  <h3>$for(author)$$author$$sep$<br/>$endfor$</h3>
-  <h4>$date$</h4>
+  <h2>$for(author)$$author$$sep$<br/>$endfor$</h2>
+  <h3>$date$</h3>
 </div>
 $endif$
 $body$