[tldistro] texlive2016 prerelease testing

[Karl Berry]

Hello TeX distro people - we've reached a point in the yearly TeX Live
release where the compiled sources (and binaries) are
final-as-far-we-know, i.e., barring bad bugs.  (The regular package
updates will continue for a couple more weeks.)

I've built preliminary tarballs, etc., at
ftp://tug.org/texlive/Images/test/ as usual.  If anyone has a chance for
any testing or review, that would be great.

Thanks,
Karl