Give fail2ban systemd support

I assume nobody's really been using fail2ban since it has been 0.8 up to now and 0.9 added support for reading the system journal. These commits update it to 0.9.

Also, python27Full is in the pythonPath for fail2ban because otherwise it can't find the _sqlite3 module. If anyone knows a better way to address that problem, I'd like to hear it.
```self```? That looks weird. Why is that needed?