change ScalFMM to SCALFMM in the code and the cmake files

Addons/CKernelApi/CMakeLists.txt

Addons/FmmApi/CMakeLists.txt

Addons/FmmApi/Src/ScalfmmApiCore.cpp

CMakeLists.txt

Doc/CMakeLists.txt

Doc/Site_dox/FDownload.dox

Examples/CMakeLists.txt

Examples/ChebyshevInterpolationMPIFMM.cpp

Examples/LagrangeInterpolationFMM.cpp

Examples/changeFmaFormat.cpp

Examples/compareAllPoissonKernels.cpp

ScalFMMConfig.cmake.in

Src/CMakeLists.txt

Src/Core/FAlgorithmBuilder.hpp

Src/Files/FMpiTreeBuilder.hpp

Src/GroupTree/Core/FGroupTaskStarpuAlgorithm.hpp

Src/GroupTree/Core/FGroupTaskStarpuMpiAlgorithm.hpp

Src/GroupTree/Cuda/FCudaDeviceWrapper.cu

Src/GroupTree/Cuda/FCudaDeviceWrapper.hpp

Src/GroupTree/OpenCl/FOpenCLDeviceWrapper.hpp