#2 Ability to adjust double precision in pxview

[Modestas Vainius (aka MoDaX)]

Hello,

I would like to propose a patch for pxview, which adds an
additional optional command line parameter, which allows
to change the precision used when outputting values of
the type "double". The default value of 6 (which is actually
the default for fprintf("%g")) doesn't fit my needs, thus I
thought that ability to choose it could be useful for other
users too. I named the new option as "double-precision"
and added a short description of it to pxview --help.
What's left is to update a man page.

Finally, thank you for providing a nice library/program. I
found it extremely useful for me. As I could see from the
debian/changelog, you're a Debian developer. As a Debian
user, I would like to see this library/program in the official
Debian archive!

[Modestas Vainius (aka MoDaX)]

The proposed patch