import giflib from oldpackages, update to 5.1.0 and add myself as maintainer

Signed-off-by: Oliver Ertl <oliver-ertl@t-online.de>
inport tiff from oldpackages, refresh patches and add myself and maintainer

Signed-off-by: Oliver Ertl <oliver-ertl@t-online.de>
Merge pull request #108 from currywurst76/master

Imports giflib & tiff from oldpackages.