Add libtiff.

[rorynolan]

Hi there, Here's a libtiff entry. I'll endeavour to remember to update this entry if and when necessary. Keep up the good work, I adore r-hub. Thanks, Rory

[jeroen]

The rpm name is libtiff-devel, which you can check on https://apps.fedoraproject.org/packages/.

For deb it is better to use the generic libtiff-dev rather than require exactly version 5 (which may not be available on many systems).

[rorynolan]

OK I fixed this now, thanks a lot Jeroen :-) I'm learning a lot from you.

[gaborcsardi]

Thanks, DB updated.