Stop copying files in preprocess script #86
Description
Some files like /src/msgpack/pack_template.h are copied by /preprocess script. We cannot directly modify copied files because they're copied everytime the preprocess script runs and they're ignored by git (.gitignore has their file paths). This is very confusing. I think we can safely stop copying those files.
I guess this process came from the old msgpack repository, which the same files including pack_template.h had to be copied to multiple directories for a few language bindings depending on those C programs. However, we don't need it now.