Update setup.py to install Python requirements

The setup.py now generates a relocatable binary wheel using
auditwheel and patchelf. They are currently installing from
PyPI.

exo_build_ext.py

@@ -1,8 +1,5 @@
-import contextlib
-import shutil
 from setuptools import setup, Extension
 from setuptools.command.build_ext import build_ext
-from pathlib import Path
 import subprocess
 import sys
 import os

setup.py

@@ -27,3 +27,8 @@
       cmdclass = {'build_ext': cmake_build_ext},
       ext_modules = [Extension("exodus", [""])]
 )
+wheels = os.listdir("dist")
+platform = "linux_x86_64"
+subprocess.run(["python", "-m", "pip", "install", "auditwheel", "patchelf"])
+for wheel in wheels:
+      subprocess.run(["python", "-m", "auditwheel", "repair", "--plat", platform, f"dist/{wheel}"])