Make dispensers to be able to interact with cauldron:

• Dispensers with a water bucket can fill the empty cauldron in front of it, returning a empty bucket. If the cauldron has some water nothing happens (just don't drop it plz).

• Dispensers with a water bottle can add one level of water to the cauldron in front of it, returning a empty bottle. If the cauldron is full nothing happens.

• Dispensers with a empty bucket can empty the fully filled cauldron in front of it, returning a water bucket (or drop it if there's no room). If the cauldron isn't full nothing happens.

• Dispensers with a empty bottle can remove one level of water from the cauldron in front of it, returning a water bottle (or drop it if there's no room). If the cauldron is empty nothing happens.

This feature is already in minitweaks called dispensersUseCauldrons

This would be super nice. The other day I wanted a compact T flip flop that I could toggle with an Observer's pulse, and this idea came to mind. It just makes sense, is basically just as compact as a piston TFF, and doesn't move blocks. Just plain nice ^^

#212