OBSOLETE: do not use in new documents. This package will do nothing in LaTeX
formats after 2015/01/01 as the fixes that it implements were incorporated into
the fixltx2e package, which is itself obsolete as since the 2015/01/01 release
these fixes are in the LaTeX format itself. Fix mark handling so that
\firstmark is taken from the first column if that column has any marks at all;
keep two column floats like figure* in sequence with single column floats like
figure.
