Corentin L.

Results 2 issues of Corentin L.

This is a pull request to had support for CUFFT and CUDA in PencilFFTs. `CUFFT` does not accept some `FFTW` so I had to make a specific `FFTW` call to...

Not yet finished with CUDA I guess ... It works for transposition on single processors, but when switching to multiprocessor, there are still some errors. ```julia Closest candidates are: convert(::Type{T},...