fix #1496
Use custom repo for tcpdf
Fix #1497 Resizing images is not working on tablet in paysage mode
Merge pull request #706 from nlegoff/fix_1497

[3.8] Fix #1497 Resizing images is not working on tablet in paysage mode
Fix #1529 : Update to PHP-FFMpeg 0.4
Fix #1518 Can not edit tags in metadatas settings
Merge pull request #707 from romainneutron/fix-1529

[3.8] Fix #1529 : Update to PHP-FFMpeg 0.4
Merge pull request #695 from jygaulier/3.8-fix1496

[WIP][3.8] fix #1496
Merge branch '3.8'

Conflicts:
	composer.json
	composer.lock
	lib/classes/task/Scheduler.php