Reorganize ctti, comment out assert.
Reorganize ctti, comment out assert.

Order ctti by signed and then unsigned types, and further by
increasing bit width.  Comment out the assert that we're creating
an unsigned value, since it triggers an annoying warning.

git-svn-id: 353be9ac11a1e711854a13efcc2fc17d9d6b83e7@1235 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok