v0.3.2

37cf5d4 add: example for package group file
f9850d8 add: test for Config._write_config_stub
579d375 add: Config._write_config_stub
debfb03 add: expanded README
fd87094 add: version information
ab0ecf3 chg: tests with better variable names
5b154b4 chg: logging levels at various places
27ae6b5 chg: reordered imports
63fe4a3 chg: warn when not knowing any groups
4b2eaae chg: logger info and warning output
1d2a1fa add: logger setup
0cbb0c9 add: tests for Config and get_user_confirmation
05d609c add: logging
5b8df11 chg: refactored Config
eac205a chg: refactored get_user_confirmation
c34cfb9 chg: refactored Config.__init__
6c49696 chg: global config replaced by Config class
3441035 add: tests
4b214ab del: print_content_of_group
443ff3b chg: renamed show-group to show
ce3202a chg: refactored show_group