Eluna Support for AuctionHouse Hooks pls read note.

NOTE:
  * AUCTION_EVENT_ON_SUCCESSFUL // NOT SUPPORTED YET
  * AUCTION_EVENT_ON_EXPIRE     // NOT SUPPORTED YET

  * OnAdd: Called when ADDING an auction to the auction house.
  * OnRemove: Called when REMOVING or BUYOUT of item.
  * OnSuccessful: Called when BID is won.  // NOT SUPPORTED YET
  * OnExpire: Called when auction EXPIRES. // NOT SUPPORTED YET

TODO:
  * Add Support for AUCTION_EVENT_ON_SUCCESSFUL
  * Add Support for AUCTION_EVENT_ON_EXPIRE

Thanks Foereaper for this Patch =)

Signed-off-by: Salja <salja8840@gmail.com>