STYLE: use auto and cfind to simplify selector usage (issue #512)

...RFoam/PDRModels/dragModels/PDRDragModel/PDRDragModelNew.C

...tion/PDRFoam/XiModels/XiEqModels/XiEqModel/XiEqModelNew.C

...bustion/PDRFoam/XiModels/XiGModels/XiGModel/XiGModelNew.C

.../solvers/combustion/PDRFoam/XiModels/XiModel/XiModelNew.C

...tyModels/mixtureViscosityModel/mixtureViscosityModelNew.C

...ocityModels/relativeVelocityModel/relativeVelocityModel.C

...oPhaseMixtures/newtemperaturePhaseChangeTwoPhaseMixture.C

...haseChangeTwoPhaseMixture/newPhaseChangeTwoPhaseMixture.C

...oam/interfacialModels/dragModels/dragModel/newDragModel.C

...atTransferModels/heatTransferModel/newHeatTransferModel.C

...aseSystem/diameterModels/diameterModel/newDiameterModel.C

.../interfaceCompositionModel/newInterfaceCompositionModel.C

...ssTransferModels/massTransferModel/newMassTransferModel.C

...els/saturationModels/saturationModel/newSaturationModel.C

...ensionModels/surfaceTensionModel/newSurfaceTensionModel.C

.../aspectRatioModels/aspectRatioModel/newAspectRatioModel.C

...oam/interfacialModels/dragModels/dragModel/newDragModel.C

...atTransferModels/heatTransferModel/newHeatTransferModel.C

...oam/interfacialModels/liftModels/liftModel/newLiftModel.C

...els/swarmCorrections/swarmCorrection/newSwarmCorrection.C