Add core spec count to job credential

Add specialized core count field to job credential data.
NOTE: This changes the communications protocol from other pre-releases of
version 14.03. All programs must be cancelled and daemons upgraded from
previous pre-releases of version 14.03. Upgrades from version 2.6 or earlier
can take place without loss of jobs
Add version number to node and front-end

Add version number to node and front-end configuration information visible
using the scontrol tool. Sview and sinfo still need to be changed.