Adding this makes the library build successfully on Mac Catalina with Miniconda 3.7 on the latest CLANG. Otherwise you get errors that in C99 the functions "write", "close", and "read" aren't defined.
Apply clang-format-all.sh using the _clang-format file through all the cpp/.h files.
make sure not to apply it to certain serialization structures, since some parser expects the * as part of the name, instead of type.
This commit contains no other changes aside from adding and applying clang-format-all.sh