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
What?

> Creature* killedCre = victim->ToCreature();

Attempts to initialize it

> if (killedCre && killedCre->hasLootRecipient())

Makes sure *killedCre* is valid