- Add *.cc files to qtcreator project as well as .cpp and .cxx
(would be needed for correct generating projects with libmv library).
- Added negate_v2 and negate_v2_v2 functions. They'll be needed for
camera tracking project.
- Fixed issue with generating proxies from 32bit images.
(generated jpg-s opened fine in blender, but were dark in osx viewer).
- Marked unused arg in indexer as UNUSED.