GLMixer Code

Compilation with USE_NVIDIA_CUDA: find CUDA Package, find NVCUVID
library, add library CUDADecoder and CUDAVideoFile.

Ineffective implementation of CUDAVideoFile

Creating CUDAVideoFile, inheriting from VideoFile to implement the CUDA
decoding.

Compilation of VideoPicture class in its own files (extracted from
VideoFile)

Compilation of libCUDADecoder.

Encapsulating CUDA Decoder code in namespace cuda.

Initial commit of libCUDADecoder: this library will enable the GPU accelerated decoding of MPEG and H264 codecs. It is compiled if USE_NVIDIA_CUDA is checked in cmake.

Cleanup code removing commented lines

Compilation fix libOSCPack

Code Fix after Valgrind suggestions.