tidying tabled lists for IE7 and lower

I've tidied tabled lists in IE that use .document-list i.e. document list index pages and latest feeds list on org home pages and topics pages.

I think we could convert latest feeds list to actual lists (ul etc) instead of tabular list. This would make them easier to style consistently across browsers.

https://www.pivotaltracker.com/story/show/43965367