Customizable script to allow honor from creature kills

* See CONF section: CUSTOM SERVER OPTIONS - CREATURE HONOR
* For existing servers, please import: characters_create_creaturehonor_message.sql
* Made a change to CMakeLists.txt which allows inclusion of custom scripts. Re-run CMake if you're not starting fresh.
AuctionBot doesn't access mysql directly, it's AuctionHouse that deletes each auction with a transaction. It actually spotted a bottleneck in TC implementation of the AuctionHouse (think about a very populated server with thousands of auctions expiring each second, each one generating 1 async transaction with no ahbot involved)