Code portability

[pcosme]

So far, the compilation of the code has been tested mainly on Fedora systems and Ubuntu in some cases. We should take care to the compilation procedure to be functional in several Unix systems such as mac os.

[pcosme]

It has come to my attention that in de Ian based systems the cmake list should explicitly set include_directories(${HDF5_INCLUDE_DIRS})

[pcosme]

in some unix systems (ubuntu, mint and macOS) it seems that the cmake becomes a bit confused at first, not having the tethys_library already archived at the ./lib directory, this can be overcome by running make tethys_library between cmake configuration.

More serious is the situation with the openmp and clang on macos which i haven't yet found a solution