qsheff 0.8 release candidate

qSheff 0.8 will be out after this candidate. Please test it.

- Code improvements, ready for stable release
- Checking against unsafe∅ headers
- White/Black List
- Nice Logging for system administrators
- Subject Filter with regular expressions, added qsheff.rules
- Generic wrapper that supports any spammer or any antivirus
- Blackhole against random generated sender adresses