New app model initial commit
Please take into account that DB connection is still local.
Commit is done only for the sake of merging its content with Martin's
work.
Merge branch 'persistence' into develop

TagResource should be fixed to work according to the current model!
DB Connection uses delange.diskstation.me 'lapps_new' db!

Conflicts:
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/entity/AppTagEntity.java
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/entity/UserEntity.java
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/resource/ApplicationResource.java
	LAPPS-backend/src/main/java/de/rwth/dbis/layers/lapps/resource/UsersResource.java
credentials hidden
- oidcId changed back to Long
- doc resources
Merge pull request #116 from learning-layers/merge_new_data_model

Merge new data model