Updated wrapper method put to not delete empty fields.  - And added new field 'updatedAt'
Updated wrapper method put to not delete empty fields.
 - And added new field 'updatedAt'

Summary:

 A get is called first to collect all existing values, then a put is called to
 to update the required fields, finally a get is called to return the updated document.
 We can probably optimize this later.

MrFjellstad/retrospectacular,MrFjellstad/retrospectacular,FronterAS/retrospectacular,FronterAS/retrospectacular,plumpNation/retrospective,plumpNation/retrospective,plumpNation/retrospective,MrFjellstad/retrospectacular,FronterAS/retrospectacular,FronterAS/retrospectacular