Add more food, fix eating whilst looking at air - Update voxel-food, voxel-health, voxel-use

deathcap/voxel-food@d7235c8a29a99e8ffda7ef8adc6c17aa9ceb1583 Disable most food items by default for now to avoid clutter, may enable again later. Ref deathcap/voxel-food#GH-1
deathcap/voxel-food@bd5dd7e323b14976a8a9d1f9dec26b587b322988 Add many more food items. Closes deathcap/voxel-food#GH-1
deathcap/voxel-food@dfdd3ba7509fca7ecac17efd89e4ded7cdb057c9 Refactor item registration; opts.items
deathcap/voxel-food@cbc7fa0e715a3f460ed25da45745384fed2062f5 Pass amount as bound parameter
deathcap/voxel-health@594eec60b1e1dbdffc52e88c23a49fc6d839bcbf Negative amounts flip hurt/heal
deathcap/voxel-use@0c10d9fe4ef17589a256119f5ac50d1b89970aa2 Fix onUse not firing when right-clicking air. Closes deathcap/voxel-use#GH-1

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