Merge pull request #1309 from chleh/extrapolation-less-templates

NumLib/Extrapolation/ExtrapolatableElement.h

NumLib/Extrapolation/ExtrapolatableElementCollection.h

NumLib/Extrapolation/Extrapolator.h

NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.cpp

NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.h

ProcessLib/ExtrapolatorData.h

ProcessLib/GroundwaterFlow/GroundwaterFlowFEM.h

ProcessLib/GroundwaterFlow/GroundwaterFlowProcess.cpp

ProcessLib/GroundwaterFlow/GroundwaterFlowProcess.h

ProcessLib/Process.cpp

ProcessLib/Process.h

ProcessLib/SecondaryVariable.h

ProcessLib/TES/TESLocalAssembler-impl.h

ProcessLib/TES/TESLocalAssembler.h

ProcessLib/TES/TESLocalAssemblerInner-impl.h

ProcessLib/TES/TESLocalAssemblerInner.h

ProcessLib/TES/TESProcess.cpp

ProcessLib/TES/TESProcess.h

Tests/NumLib/TestExtrapolation.cpp