fixed tests (call resetDevice, if there was a gpu failure)
fixes for gpu module:

- fixed printCudaDeviceInfo for new CC
- fixed some compilation errors and warnings
- removed unset command from CMake script
- removed unused std imports
optimizations:

- new reduce implementation (with kepler optimizations)
- saturate_cast via asm command
- video SIMD instructions in element operations
- float arithmetics instead of double
- new deviceSupports function
added more types support for gpu separable filters
implemented Luv/Lab <-> RGB conversion
fixed build for CARMA:

- added CMake toolchain file
- added WITH_NVCUVID flag
Merge pull request #328 from jet47:new-gpu-fixes