PR 32097

Added image and pdf extraction.

Facts and todos:

* Need to add TCA definitions
* This uses PHP functions only, no support for third party tools
* This extracts the most common exif and ipct data from images
* Currently no support for XMP data
* Think about normalizing city and country codes by using static_* data
* ZendPdf seems to be very picky about PDFs and is no longer maintained,
	but I  found no good alternative (except pdfpasrer but its about 30mb)

We could squash some commits to have a nicer merge late ron. Please give some feedback!
I am not sure how the EM will behave - that is because I would let the require_once as it is for the time being. However, to my experience, it will work if you install your whole website through Composer itself, e.g. https://github.com/Ecodev/typo3-cms-speciality-distribution/blob/master/htdocs/composer.json