CSS tweaks in support of new Doxy function layout

[SVN r33446]

doc/html/boostbook.css

@@ -155,6 +155,25 @@ td .screen, td .programlisting
     padding: 0.5em 0.5em 0.5em 0.5em;
 }
 
+/* Variable lists as tables, as used by Doxygen-generated
+   reference docs */
+span.term
+{
+    font-weight: bold;
+}
+
+div.variablelist table tbody tr td
+{
+    text-align: left;
+    vertical-align: top;
+    padding: 0em 2em 0em 0em;
+}
+
+div.variablelist table tbody tr td p
+{
+    margin: 0em 0em 0.5em 0em;
+}
+
 /* tone down the title of Parameter lists */
 div.variablelist p.title
 {