osx install torch and fast neural style

###osx install torch and fast neural style

<br /> lua/5.1/hdf5/ffi.lua:56: ')' expected near '_close' at line 1478

Edit ffi.lua line 44,
change
local process = io.popen("gcc -E " .. headerPath) -- TODO pass -I
to
local process = io.popen("gcc -D '_Nullable=' -E " .. headerPath) -- TODO pass -I.

luarocks  install  hdf5
brew install hdf5@1.8


export LDFLAGS="-L/usr/local/opt/hdf5@1.8/lib"
export CPPFLAGS="-I/usr/local/opt/hdf5@1.8/include"


hdf5._config = { HDF5_INCLUDE_PATH = "/usr/local/opt/hdf5@1.8/lib", HDF5_LIBRARIES = "/usr/local/opt/hdf5@1.8/lib/libhdf5.dylib;/usr/local/lib/libsz.dylib;/usr/lib/libz.dylib;/usr/lib/libdl.dylib;/usr/lib/libm.dylib" }


// wget http://msvocds.blob.core.windows.net/coco2014/train2014.zip
// wget http://msvocds.blob.core.windows.net/coco2014/val2014.zip
wget http://images.cocodataset.org/zips/train2014.zip
wget http://images.cocodataset.org/zips/val2014.zip

jar xvf train2014.zip
jar xvf val2014.zip

python scripts/make_style_dataset.py \
  --train_dir train2014 \
  --val_dir val2014 \
  --output_file data/ms-coco-256.h5