Next stage of new 64bit dimension functions. Refs #285
Next stage of new 64bit dimension functions. Refs #285

git-svn-id: 1001b6e0dd469eaa302a741812f7f5d223cf35f7@1641 ff5d1e40-2be0-497f-93bd-dc18237bd3c7

nexusformat/code,nexusformat/code,nexusformat/code,nexusformat/code,chrisemblhh/nexus,chrisemblhh/nexus,chrisemblhh/nexus,nexusformat/code,chrisemblhh/nexus,chrisemblhh/nexus