cuDNN.

need to deal with it.

confused when that name appeared on the command line.

we don't know what compiler we are dealing with.  If the test compile works
then we assume we have C++11.

really supports the version of CUDA we found.

a few things.

details.

--HG--
rename : dlib/dnn/cublas_api.cpp => dlib/dnn/cublas_dlibapi.cpp
rename : dlib/dnn/cublas_api.h => dlib/dnn/cublas_dlibapi.h
rename : dlib/dnn/cuda.cu => dlib/dnn/cuda_dlib.cu
rename : dlib/dnn/cuda.h => dlib/dnn/cuda_dlib.h
rename : dlib/dnn/cudnn_api.cpp => dlib/dnn/cudnn_dlibapi.cpp
rename : dlib/dnn/cudnn_api.h => dlib/dnn/cudnn_dlibapi.h

--HG--
rename : dlib/dnn/cublas.h => dlib/dnn/cublas_api.h
rename : dlib/dnn/cudnn.h => dlib/dnn/cudnn_api.h