fix: timezone from file metadata, or from locale if absent

test: new test for input validation, and fix typo in args

fix: typehints compatible with py3.9

doc: added docstrings to new functions

test: updated test to match interface; solved other xfail tests

feat: get coordinates from file, populate input boxes

feat: hash used as identifier

feat: merge dev and into image batch

feat: refactor and multi image classification