Add sources from HDL repository

.gitignore

README.md

src/Makefile

src/backend.hpp

src/backend/distributed.cpp

src/backend/distributed.hpp

src/backend/simple.cpp

src/backend/simple.hpp

src/backend/tiled.cpp

src/backend/tiled.hpp

src/cifar10.cpp

src/core.hpp

src/kernels/conv_bwd_dw.txt

src/kernels/conv_bwd_dx.txt

src/kernels/conv_relu_fwd.cpp

src/kernels/conv_relu_fwd.hpp

src/kernels/conv_relu_fwd.txt

src/kernels/kernels.hpp

src/mmap.cpp

src/mmap.hpp