First GPU implementation of DNNs.

[simonpf]

No description provided.

[omazapa]

HI Simon, I saw your code but I am having the next error without cuda installed.
In file included from input_line_12:33:
In file included from /home/ozapatam/Projects/root/compile/include/TMVA/MethodDNN.h:62:
/home/ozapatam/Projects/root/compile/include/TMVA/DNN/Architectures/Cuda.h:23:10: fatal error: 'cuda.h' file not found
#include "cuda.h"
May you need to put some macrodefines there.
Also in the cmake file you are putting the compiler manually set(CUDA_HOST_COMPILER "/usr/bin/g++-4.8") that is not good idea, we can to enable C++ compilation by default using CUDA_HOST_COMPILATION_CPP or are you having other issue there?

[pcanal]

The coding convention requires camel case for function names.