Etho's Echo Shards

Edited the Bat loot table to drop Echo Shards on death.

• By default bats drop 0-1 Echo Shards.
• With Looting I bats drop 0-2 Echo Shards.
• With Looting II bats drop 0-3 Echo Shards.
• With Looting III bats drop 0-4 Echo Shards.