The other technique (left margin in pixels) was simpler and worked
well on Firefox 10.0 and Chromium 6 in Linux, but it was far from
perfect in Firefox 15 on Windows. This technique (position relative
in #box and "right 100%" in the tabs) is also more general, although
that should not be important in this project (we should not need any
other boxes with tabs).

The other technique (left margin in pixels) was simpler and worked
well on Firefox 10.0 and Chromium 6 in Linux, but it was far from
perfect in Firefox 15 on Windows. This technique (position relative
in #box and "right 100%" in the tabs) is also more general, although
that should not be important in this project (we should not need any
other boxes with tabs).

This reverts commit 4a229898.

Conflicts:

	media/css/styles.css

This is a fairly broad commit that restructures the box model of the
page. Changes in elements are interdependent and thus could not be
atomized.