- removed all controller methods from 'app/Controlles/Http/Admin/UsersControllers.ts'
- merged all authentication methods inside 'app/Controllers/Http/Auth/UserController.ts'
- npm updates for webpack-encore and postcss-loader
- DatasetExtension.ts: use relation contributors for PersonContributor
- added DoiClient.ts and DoiClientContract.ts
- rozes.ts: addes routes for creating and storing doi identifier
- addes xslt doi_datacite.xslt needed for registering DOI identifier
