managedCuda for CUDA 7.5

Updated to version 7.5:

• CUDA 7.5
• CUDABLAS
• CUDASPARSE
• CUDARAND
• NPP
• CUDASOLVE
• NVRTC
• added SetComputeSize() to CudaKernel to define grid dimensions
• added NPPJpegCompression to managedCuda samples