Gregic Tinkering

Added air system:

• Air Fed tools can now consume air from air tanks.
• Air tanks are provided by a new Air Tank modifier.
• Air is drained when attacking, and when mining blocks.
• Air is shown in a bar on the top of the item. This will not be shown if the air tank is full.

Added config file:

• Sets air tank capacity and air use per melee attack.

Fixed block breaking resetting and items playing reequip animations when NBT changes. IGTTool no longer plays any role in either of these functions.

Fixed Dwarvern modifier (and other modifiers which affect harvest speed) from allowing unpowered tools to harvest blocks.

Transformer now consumes an ability slot, rather than an upgrade slot.

Added Ad Astra compat! When Ad Astra is installed, Ad Astra will be used in place of the no_air tag to determine if there is air at the users location.

The End is no longer tagged as having no air.