0.2.1: Improved error handling

Fixed issue with timeout error if pi-hole server is not running.

0.2.0: Added perfdata and updated code style

• added perfdata. Thank you @n1tr0-5urf3r
• added parameter --port in case pi-hole web ui is binded to a different port
• added flake8 configuration
• fixed syntax according to flake8 violations

0.1.2

Added options and fixed readme

• added option to force critical if pi-hole is disabled
• added option to force warning if pi-hole is disabled
• fixed readme and help messages

0.1.1

First release with basic functionality