Minor cleanup (i.e. comments) on other APIs.

   in quite awhile.

 o added section glossing over job initiation design and corresponding
   figures.

Modified print method to print to a file descriptor instead of stdout.

correct warning in qsw.c

I am implementing the new comm layer in all the api functions
added sockopt parameter SO_REUSEADDR to eliminate socket turn around time during debug.

slurm_protocol_errno.h provides a default place for slurm specific error definitions until Jim completes his general errno implementation

Cleaned up comm layer , this never ends :)
added pack and unpack routines for new communcations paradigm