Add build manifest for builds.sr.ht
Bump minimum Python version to 3.6
Update docstrings
Fix comma placement
Update copyright year in license
Update contributing information in README
Update links and installation instructions in README
Add contributing information to README
Add bugfix version number for PyPi
Version 0.3.2

More bug fixes regarding incompatibility of Python 3.5 system calls with
Version 0.3.1

  - Fix pathlib error with open() call in Python 3.5
  - Look for config file in /etc/pushbroom if not found in user's home
Bump version number to 0.3.0
Add option to remove empty subdirectories

The RemoveEmpty option (default: true) will remove empty subdirectories
from monitored paths.
Move options into a dict

This makes it easier to add new options in the future.
Create trash directory if it does not exist
Add mypy and typing information
Update systemd files to use a timer
Use pathlib in test