Feature request #1591: Use fewer divs in comments lists

Currently the DOM for comments on blog posts (and other similar "commentables") looks like this (using a Haml style syntax):

.comments
  .comment.even
  .comment.odd
  .comment.even
  ...

I think I'd like to replace the outer comments "div" element with a "ul" or "ol" element.

And the inner comment "div" elements with "li" elements. The classes would remain the same:

%ol.comments
  %li.even
  %li.odd
  %li.even

But note how we could drop the comment class off the "li" elements, because they can all be targeted with a selector like ol.comments>li.

So the benefit would be a slightly less verbose markup, and a more semantically faithful "ol" for what is, after all, an "ordered list of comments".