unused imports removed and PEP8 corrections

common_helper_files/__init__.py

-__version__ = '0.1.5'
-
 from .file_functions import read_in_chunks, get_directory_for_filename, create_dir_for_file, human_readable_file_size
 from .git_functions import get_version_string_from_git
 from .hash_functions import md5sum
 from .fail_safe_file_operations import get_binary_from_file, write_binary_to_file, get_safe_name, delete_file, get_files_in_dir
 from .config_functions import update_config_from_env
 
+__version__ = '0.1.5'
+
 __all__ = [
     'get_directory_for_filename',
     'create_dir_for_file',

setup.py

-import os
-import subprocess
 from setuptools import setup, find_packages
 from common_helper_files import __version__
 
@@ -10,5 +8,6 @@ setup(
     install_requires=[
         'hurry.filesize >= 0.9'
     ],
-    description="file operation helper functions"
+    description="file operation helper functions",
+    license="MIT License"
 )