Merged hotfix branch l10n-bug, now allowing to set language manually
Fixed the way to attach files to mail into lib/mail.php
Adapted the way to send the mail attachments into export-image/plugin.php
Changed the From header of the mail.php
Merge branch 'hotfix/MailAttachments' into develop
Merge branch 'develop' of github.com:datawrapper/datawrapper into develop