Beta 0.2.0 release

Changelog:

• Bugfix: More robust systemd trigger (Issue #1)
• Bugfix: More robust server decomissioning (Issue #2)
• Bugfix: More robust systemd units by templating paths to dnsmasq, wg and wg-quick (Issue #3)
• Enhancement: Rate limiting for password resets, once per 30s and 10 per day (Issue #4)

If you're upgrading:

1. Re-run the setup_wireguard_web.sh script,
2. Activate your venv and run python manage.py migrate to add the enabled field and the password reset DB-tables
3. Restart the service (if you used the provided systemd service: systemctl restart wireguard-web-ui
4. Re-deploy your configuration by changing something in the web UI (simple press on Save on the Django admin interface of a client or server will suffice)