Implement uploads
Remove slashes from the upload path. Make alt for the image more proper.
Updated deps
Add upload notes
Simplify controller
Move validations to the File class
Fade out error message
Add fileupload to add and edit layouts
Add docblock
Make file's key optional
Merge branch 'master' into uploads

Conflicts:
	composer.json
	composer.lock
Make strings translatable
Update translations
Apply raw filter
Merge branch 'master' into uploads

Conflicts:
	composer.lock
	src/App/Tracker/g11n/de-DE/de-DE.Tracker.po
	src/App/Users/g11n/templates/Users.pot
Change: Do not always update language template files
Change: Do not create backup files for language translation files
Update phpcs submodule
Update .gitignore
Update controllers