General improvements to visual rendering of .odt documents.
We can now (more) correctly render cell widths, documents containing more than just a table, documents containing lists within table cells, and documents containing variable formatting within a single table cell.

Significantly improves rendering of example in <a href="http://bugs.kde.org/show_bug.cgi?id=154980">http://bugs.kde.org/show_bug.cgi?id=154980</a>;
There is still an issue relating to list indenting.