Solved issue with renamed research output description

Merged feature/madmp_api

Deactivated to_string method for madmp_fragments, needs rework

Fixed minor issues in models

Fixed DMP model

Fixed issue with DMP model

Updated models

Renamed 'dbId' to 'dbid'

Solved issue with parent reference update function

Implemented GET madmp_fragment API route

Added updated fragment models

Updated templates

Fixed issue with full fragment method

Added method to extract a fragment with its children

Fixed sub fragments display

Changed the way schemas are pulled from the database

Merged sub fragment saving

Research output info now goes to the proper fragment property when editing a research output

Research output description can now be edited in Write Plan tab

Added ResearchOutputDescription fragment class

Moved validation info to the new additional_info field

Fragment form now submits to the fragment controller

Updated fragments models according to the data model

Dynamic form now displays when the data is saved and validated by the json schema

Fixed single sub fragment saving

Sub Fragments should include the list of persons

Fixed linked fragment display

Added function to get sub fragments

Added function for sub_schemas loading

Dynamic forms should use schema_id instead of classname