fieldAverageItem → OpenFOAM Relation

File in src/functionObjects/field/fieldAverage/fieldAverageItem	Includes file in src/OpenFOAM
fieldAverageItem.H	containers / NamedEnum / NamedEnum.H
fieldAverageItem.H	primitives / bools / Switch / Switch.H
fieldAverageItemIO.C	db / functionObjects / functionObjectList / wordAndDictionary.H