fix: XMLStripper crashing the workflow if no XML found in one text

Signed-off-by: Stephen L. <lrq3000@gmail.com>
fix: .gitignore and TreeTagger binaries for Windows and MacOSX

Signed-off-by: Stephen L. <lrq3000@gmail.com>
fix: runner.reader.get_filepath() now returns absolute full path instead of relative to textrootdir

Signed-off-by: Stephen L. <lrq3000@gmail.com>