Version 0.4

### 0.4
 * NEW: extracts events (boot/shutdown, hibernation in/out, sudo
commands, usb devices, ttys opened/closed, from the system logs and
create a (not readable yet) timeline (-e/eventlogs)
 * NEW: extracts users' LoginItems
 * NEW: extracts users' RecentItems
 * NEW: extracts the LastSession from Safari artifacts
 * NEW: extract system groupes and users details
 * FIX: wrong os.path.join() calls
 * FIX: bug in the recursive ParsePackagesDir()