Use h1 tag for the title instead of h2 (#512)

* Use h1 tag for the title instead of h2

From https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/Heading_Elements: "A page should generally have a single <h1> element that describes the content of the page (similar to the document's <title> element)." Also change scribble.css so that the h1, h2, h3, etc heading font-sizes match the old h2, h3, h4, etc font-sizes.

* fix overlap of version box and authorlistbox

Author: stevebyan

scribble-lib/scribble/html-render.rkt

@@ -1150,9 +1150,10 @@
                            (= 2 (length t))
                            (cadr t))))
                   `((,(case (number-depth number)
-                        [(0) 'h2]
-                        [(1) 'h3]
-                        [(2) 'h4]
+                        [(0) 'h1]
+                        [(1) 'h2]
+                        [(2) 'h3]
+                        [(3) 'h4]
                         [else 'h5])
                      ,(append
                        (if (and src taglet)

scribble-lib/scribble/scribble.css

@@ -57,15 +57,28 @@ p, .SIntrapara {
   margin: 1em 0;
 }
 
-h2 { /* per-page main title */
+h1 { /* per-page main title */
+  font-size: 1.5em;
   margin-top: 0;
 }
 
-h3, h4, h5, h6, h7, h8 {
+h2, h3, h4, h5, h6, h7, h8 {
   margin-top: 1.75em;
   margin-bottom: 0.5em;
 }
 
+h2 {
+  font-size: 1.17em;
+}
+
+h3 {
+  font-size: 1.00em;
+}
+
+h4 {
+  font-size: 0.83em;
+}
+
 .SSubSubSubSection {
   font-weight: bold;
   font-size: 0.83em; /* should match h5; from HTML 4 reference */
@@ -487,7 +500,7 @@ ol ol ol ol { list-style-type: upper-alpha; }
   position: relative;
   float: right;
   left: 2em;
-  top: -2.5em;
+  top: -2.25em;
   height: 0em;
   width: 13em;
   margin: 0em -13em 0em 0em;