Demo release
Added two new plugins:
- OSF
- REDCap
Other changes:
- Replaced SWORD API file uploading by add/replace native API (except for zip files: SWORD is still used, as native API gives errors).
- URL signing (can be activated once that SWORD API is no longer used for deletes and file uploads).
- Error messages on job failure can be emailed to users (after configuring SMTP settings). Also, mails can be sent after successful completion, if chosen so by the user.
- Refactorings for reusability and readability.
- Several bug fixes.