Not abel to load file paths with symlinks

[dickscheid]

Pytiff gives an OSError: file not found when opening a new image with pytiff.Tiff('filename.tif') in case that the filename path is a symlink. I could overcome this problem by doing from os import readlink; pytiff.Tiff(readlink('filename.tif')); however this is not the expected behaviour.

[dickscheid]

In fact the os.readlink command mentioned above will fail if the filename is not a link. The safer solution is os.path.realpath. Using this by default inside pytiff might be a safe solution, but I am not sure wether it is platform independent (tested only on the Jülich JUDAC linux system).