Log Message:
py-configupdater: added version 3.1

The sole purpose of ConfigUpdater is to easily update an INI config file with
no changes to the original file except the intended ones. This means comments,
the ordering of sections and key/value-pairs as wells as their cases are kept
as in the original file. Thus ConfigUpdater provides complementary
functionality to Python's ConfigParser which is primarily meant for reading
config files and writing new ones.