tiffcrop: -S option mutually exclusive (fixes #349, #414, #422, #423, #424)

According to Richard Nolde #401 (comment 877637400) the tiffcrop option „-S“ is also mutually exclusive to the other crop options (-X|-Y), -Z and -z.

This is now checked and ends tiffcrop if those arguments are not mutually exclusive.

This MR will fix the following tiffcrop issues: #349 (closed), #414 (closed), #422 (closed), #423 (closed), #424 (closed)