LUDOC-270 protocol: Add a 'basement' dir with support files

LUDOC-270 protocol: Add a 'basement' dir with support files

The basement has been added as a place to put content that may be
interesting to the community, but is nevertheless not directly a part
of the documentation for this project. It has, for instance, a catalog
of structures and other definitions that relate to how Lustre messages
are formed. Those files (see the README) make a direct reference to
the Lustre sources, and were the raw material for the content that
will be added shortly.

Signed-off-by: Andrew C. Uselton <andrew.c.uselton@intel.com>
Change-Id: I3f264a0f7cd0a5c50511b29af92ee9103b348d80
Reviewed-on: http://review.whamcloud.com/13919
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>