Kaolinite Test

Changes

• Changed cauldron water level from blockstate to tank in the tileentity.
• Cauldron now emits light when burning via the Forge added getLightValue method, rather than using a separate block with a different return value for the vanilla getLightValue method.
• Moved cauldron burning value from blockstate to tileentity
• Synced client with packet when filling cauldron with rain water.
• Changed outdated IFluidTank implementation to IFluidHandler capability implementation for the cauldron's tileentity.
• The cauldron now holds a wet kaolinite item when it is full of precipitate, for the purpose of automation.