FBox is a class that represents a N dimensions interval. To do so, it
keeps the maximum and minimum corners of the interval.

This class provides conversion from position to zcurve index. The position
may be relative to a center point or given as a boolean value tuple.

update cuda part and sync data with devices (cuda and opencl) it looks like it works for the test kernel

make the distribution of the work working for 1 billion and 10 procs (but need to divide the message for the P2P)

Klang-OMP allows to use a taskname clause with task constructs. This is
going to be very useful when using FxT with StarPU. As this is not part
of the official OpenMP specification, OPENMP_SUPPORT_TASK_NAME must be
specified to CMake. Currently, only literal strings are supported.