pypy.md

Ok you like the speedups of numba and you want the program to be even faster. Or maybe you're me. Here are the implementation notes for installing pypy for this program:

1. Pipenv
   you need to run pipenv --rm then pipenv --python /usr/bin/pypy3 to install pypy3
2. Dependencies
   You need several dependencies that won't work.
   1. llvmlite
      LLVM_CONFIG=/path/to/llvm-config CXXFLAGS=-fPIC pip3 install llvmlite
   2. numba and netcdf4
      I don't know how to do these

Therefore current pypy status is BROKEN