Add native algorithm from OpenMP stream extension. This require adding
one function in commtech.h: end_producer(). This function does nothing
for all communication algorithm but gomp_stream (the algorithm added by
this commit).
* Refactor the source to be able to chain more than 2 nodes together
* Compile all binaries by default (binList must be set manually in
lancement.sh to run only a subset of the binaries