architecture constants in check_os.py; minor type validations, missing file.close and variable renaming in file_line_utils.py (+ missing GPL3 header); more elegant code and, optional log file and better handling of updates in pm_utils.py; better code reusage and authentication handling in postgis_utils.py
Merge branch 'master' of https://github.com/krichter722/python-essentials
handling dependencies according to setuptools setup; removed import of mount_sources_image; removed python3-incompatible import of string module