sch-rnd-export-extra	Extra/generic export formats, lpr printing

Less commonly used text export formats:

 export attribute table CSV      yes, PLUGIN     [attbl_csv]
 export attribute table json     yes, PLUGIN     [attbl_json]
 export attribute table lihata   yes, PLUGIN     [attbl_lht]
 export attribute table tEDAx    yes, PLUGIN     [attbl_tedax]
 export Bill of Materials        yes, PLUGIN     [export_bom]
 export abstract model           yes, PLUGIN     [export_abst]
 lpr exporter (printer)          yes, PLUGIN     [export_lpr]
