* Provide for BatchQueue, CSQ, FastForward, MCRingBuffer and GOMP stream
a version using 64 cache lines in total for all buffers.
* Rename common version from _common_comm.h to _common.h to avoid
considering them as communication technique on their own
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).