Methods POST/GET for elements in Plinian, from MolecularData to AncillaryData

[nestorjal]

Create the respective methods POST and GET, to save and obtain a version for the element. With POST a new version (in JSON) of each element (ElementVersion) will be saved in the database. Method GET will retrieve the version of the element in format JSON. The parameters for the GET should be the id of the Record (id de la Ficha) and the version to search.

• [x] ThreatStatus
• [x] Legislation
• [x] UsesAtomized
• [x] ManagementAndConservation
• [x] associatedParty
• [x] MeasurementOrFact
• [x] DetailAtomized
• [x] AncillaryData
• [x] EndemicAtomized

[andresciceri]

The elements were add a new routes and tested