Bugfix: Adding of NPC Corps failed in some environments

When manually posting a killmail, adding an NPC corp failed with an SQL
error in some MySQL environments (due to an empty string not considered
NULL in date_format() function).
Thanks to Lum
Added: Generic inventory flag handling, CREST parser

- changed handling of item locations to generic handling using CCP's
  inventory flags
- added CREST killmail parser (no admin option yet for activating)
- database update of core tables for holding CREST hash
- Bugfix: Killmail parsers now correctly handles "Other" Bay
- Bugfix: Raw Killmail display now adds a correct moon name to the victim
  (if applicable)
- set killboard version to 4.0.8.0
- changed database packages for respecting number and NULL values
DB Update: removed obsolete database package files