- 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
- added model DocumentXmlCache.ts
- npm updates
- changed all models inside app/Models to use corrected BaseModel.ts
- added extra extension class DatasetExtension.ts for app/dataset.ts for caching internal and external fields
