Nested lists inside `<simplepara>`.

Not valid, but generates better html. Maybe I should use `<para>` inside
list items, and remove the margin using CSS.

[SVN r62701]

tools/quickbook

@@ -1 +1 @@
-Subproject commit 38275cb1192ed60e10839e0766daeabb3ac65940
+Subproject commit 52a5504cb4c608db040067fa8929d1008ad923b3