Most images that exceeded the slide area were too wide. These were
fixed by adding a 'max-width: 100%' CSS rule. Release cycle images in
the 01-release-cycle.rst presentation were too tall because the
two-column layout was not preserved when the presentation was converted
from the ODP source document. This change restores the two-column
layout. The images now scale appropriately across a variety of
operating systems and browsers. The print.css changes were tested with
the print rendering engines of Firefox and Chrome.
Change-Id: Ic5d4c3c959d37fda0d57009f282be1238388cc59
eabb53076a