Some old beta-tester mail suggested mentioning the implicit_uncursed
option in the "Curses and Blessings" section; this patch does that.
It also mentions that option in the "Configuring Menu Colors" section
since anyone trying to specify a color for " uncursed " will want
objects to be explicitly described as "uncursed".
The changes to the LaTeX version haven't been tested. The generated
plain text version has a lot of spurious changes due to the padding
method it uses to right-justify short lines.