Allows for make uninstall.

Set automatically to MPI if CC=mpi*

The user can specify or not the path to OFED.

There is no need for copy and/or use the external macro
for the module flag.

External macros has been copied into config/

The (doxygen) documentation and the tutorial code are built through `make docs` and
`make tutorial`, respectively.

It needs to be checked as successful compilation depend on CC version

Latex documentation is not done, only html

Require to add more possible paths according to OS.

seg_shmem is not compiling

Note the original Makefiles are still used