improved output handling

src/postProcessing/fieldAverage/fieldAverage/fieldAverage.C

src/postProcessing/fieldAverage/fieldAverage/fieldAverage.H

src/postProcessing/forces/forceCoeffs/forceCoeffs.C

src/postProcessing/forces/forceCoeffs/forceCoeffs.H

src/postProcessing/forces/forces/forces.C

src/postProcessing/forces/forces/forces.H

src/sampling/Make/files

src/sampling/outputFilters/IOOutputFilter/IOOutputFilter.H

...s/OutputFilterFunctionObject/OutputFilterFunctionObject.C

...s/OutputFilterFunctionObject/OutputFilterFunctionObject.H

...ers/outputFilterOutputControl/outputFilterOutputControl.C

...ers/outputFilterOutputControl/outputFilterOutputControl.H

src/sampling/probes/probes.C

src/sampling/probes/probes.H

src/sampling/sampledSet/sampledSets/sampledSets.C

src/sampling/sampledSet/sampledSets/sampledSets.H

...sampling/sampledSurface/sampledSurfaces/sampledSurfaces.C

...sampling/sampledSurface/sampledSurfaces/sampledSurfaces.H