* reading caption and title from several tags with several tests added
minor bugfix for date conversion to MS
optimization: break sidecar loop, when first sidecar is found
* Removed the SideCar Type to make reading sidecar data just as generic as reading the embedded exif data
* Moved metadata-mapping into separate function to prepare for reuse
* Most sidecar metadata is now read with the same function as embedded metadata (for photos). Fixed a bug with rating: 0 being ignored
* added new test for special chars and timezone
* merge incoming changes
* xmp rating fix - 0 is a value. prep for xmp timestamp handling
* refactored mapping of metadata into smaller functions
* consolidated GPS coordinate mapping
* simplification of sidecar date reading logic
* Moved date mapping code into one function - fixed testdata - did not yet resolve offset bug
* CreationDateOffset is now mapped from Sidecar timestamps. Tests updated accordingly.
Total: changed sidecar reading for video to shared reader and fixed tests accordingly (more data is read now)
Added recognition of the offset value in the UI. It will be displayed if available.
Caveat: Search will not take offset into account. A new year's picture taken in Sydney the 1st of January 2019 00:15:00 GMT+11, is technically taken in 31st of December 2018 in UTC. Therefore this picture won't show of in seaches where the after: parameter is set to 1st of january 2019.
This is both correct and wrong at the same time.
UTC-wise it is correct, local time it is not correct. I guess most people would find local time most untuitive, so there is room for improvement of the search. :)
* exifr is used for most tags now
* New timestamp handling, removed exif-parser, date supported for png
* Removed offset from testhelper. It's optional
* explanations
* Feature/timestamps (#3)
* preparing for further timestamp test
* Added more test and fixed offset calculation bug
* Revered old dimension test, added new timestamp tests, some bug fixes
* Renamed png-test because faces overrule keywords
Resolves error when sidecar metadata not complete, migrates from any to SideCar type, moves sidecar loading to after file loading, finishes async/await transition.
Added ratings to xmp sidecar support, also added rating to bunny.mp4.xmp and a different rating in IMG_5910.jpg.xmp vs what is in the photo file to test if sidecar is functioning as primary.
