* 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
This unifies logging across the backend to always use the Logger class,
always only logs to stdout (rather than an inconsistent mix of stdout
and stderr, depending on whether console.error was used), and removes
logging where two log events happened for the same message
For example, this pattern:
```js
Logger.error("Whoops, something went wrong:")
console.error(err)
```
That causes two separate log events, and depending on the log transport
used, could cause relevant log messages to get split across multiple
events and therefore be harder (usually just more tedious) to connect
and debug in production environments.
This unifies logging across the backend to always use the Logger class,
always only logs to stdout (rather than an inconsistent mix of stdout
and stderr, depending on whether console.error was used), and removes
logging where two log events happened for the same message
For example, this pattern:
```js
Logger.error("Whoops, something went wrong:")
console.error(err)
```
That causes two separate log events, and depending on the log transport
used, could cause relevant log messages to get split across multiple
events and therefore be harder (usually just more tedious) to connect
and debug in production environments.
* 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)
