Use path instead of relying on compiler include paths.
Use path instead of relying on compiler include paths.

Fixes inclusion on broken operating systems with case-insensitive
filesystems.  Grr.

git-svn-id: 353be9ac11a1e711854a13efcc2fc17d9d6b83e7@1387 c36c8488-0289-0348-9b64-b301f74bd9a7

BlueBrain/Tuvok,BlueBrain/Tuvok,BlueBrain/Tuvok