revert changes
Merge pull request #636 from takeit/tw-temp

revert changes in ArticleAttachments class
WOBS-3117: Partially restores previous verion of entity
Merge pull request #638 from m038/WOBS-3117-tmp

WOBS-3117: Partially restores previous verion of entity
FilesystemService & attachments name sanitization
Merge pull request #639 from takeit/tw-temp

FilesystemService & attachments name sanitization
Merge branch 'tw-temp' of github.com:sourcefabric/Newscoop

Conflicts:
	newscoop/application/configs/services/services.yml
	newscoop/classes/ArticleAttachment.php
	newscoop/library/Newscoop/Services/FilesystemService.php
Merge pull request #641 from ahilles107/master

Merge tw-remp to master.