Update README.md
stub/xdsAdapter can return pdf document. Use specific uuid defined in test/config/constants
Merge branch 'pdfdocstub' into develop
Merge branch 'develop' of https://github.com/Dunmail/mhd.js into develop
Merge branch 'hotfix-002' into develop
findDocumentDossiers creates valid urls for self/related
Merge branch 'hotfix-003'