Move author and file formats to metadata
Move author and file formats to metadata

The name can't be moved since it is not optional.

Contributes to issue CURA-1278.

Curahelper/Cura,senttech/Cura,senttech/Cura,fieldOfView/Cura,totalretribution/Cura,ynotstartups/Wanhao,Curahelper/Cura,totalretribution/Cura,fieldOfView/Cura,hmflash/Cura,hmflash/Cura,ynotstartups/Wanhao