D-Net

- Changed the id creation method for invoices
- Fixed a bug in request id creation

Fixed a bug in get in request manager getForProject

- Added a getRequestForUser method
- added funding info in request
- made a human friendly id for requests
- merged issn and eissn in journals

Minor bug fixes

added invoice handling code

loading affiliations for publications

- Saving publications
- Changed journal and publisher save to update or insert

- Throwing Exceptions in doi resolution
- First implementation of save and get in publication dao

added type and identifiers of resolved publication