Bug fixes:
- Fixed a typo in usage output (thanks go to Jens John)
- Properly check pledge(2) for error return values (thanks go to Sébastien Marie)
- Always set invalid colors to NULL while parsing XPM (thanks go to Sébastien Marie)
Adjustments:
- Relaxed version requirements a bit (thanks go to Sebastian Reichel)
- Major manual page layout overhaul (thanks go to Anthony J. Bentley)