Snorkel Mod

Snorkel Mod:

This mod adds a snorkel which will allow you to breath underwater when your head has a block of air above it.
When standing in water you can be submerged in 2 layers of water because your head is still one block below the air, but while swimming you must be in the top layer to get air.

Also, your air will not go up to max instantly and will now increase as it would out of water without a snorkel o