moving function objects to functionObjects sub-folder

src/postProcessing/functionObjects/Allwmake

src/postProcessing/functionObjects/fieldAverage/Make/files

src/postProcessing/functionObjects/fieldAverage/Make/options

src/postProcessing/functionObjects/fieldAverage/controlDict

...unctionObjects/fieldAverage/fieldAverage/IOFieldAverage.H

.../functionObjects/fieldAverage/fieldAverage/fieldAverage.C

.../functionObjects/fieldAverage/fieldAverage/fieldAverage.H

...Objects/fieldAverage/fieldAverage/fieldAverageTemplates.C

...e/fieldAverageFunctionObject/fieldAverageFunctionObject.C

...e/fieldAverageFunctionObject/fieldAverageFunctionObject.H

...nObjects/fieldAverage/fieldAverageItem/fieldAverageItem.C

...nObjects/fieldAverage/fieldAverageItem/fieldAverageItem.H

...bjects/fieldAverage/fieldAverageItem/fieldAverageItemIO.C

src/postProcessing/functionObjects/forces/Make/files

src/postProcessing/functionObjects/forces/Make/options

...essing/functionObjects/forces/forceCoeffs/IOforceCoeffs.H

...ocessing/functionObjects/forces/forceCoeffs/forceCoeffs.C

...ocessing/functionObjects/forces/forceCoeffs/forceCoeffs.H

...ionObjects/forces/forceCoeffs/forceCoeffsFunctionObject.C

...ionObjects/forces/forceCoeffs/forceCoeffsFunctionObject.H