Added 4 new config options:

base_health: The base health dragons should have when fully grown
base_damage: The base damage dragons should have when fully grown
allow_respawn: Should dragons be able to be re-summoned after they die? If this is turned off a dragon is completely lost on death, even if the owner isnt online when playing on a server
respawn_time: The time in seconds that you have to wait to resummon a dragon after it dies, this is by default 60 seconds

Added dragon whistles

Summoning a dragon now requires that you have a dragon whistle in your inventory that has been linked to a dragon.
To use the dragon whistle, craft one of a specific dye color and shift right click on a dragon that hasnt already been linked.
When using the summon keybind the top most valid whistle in the inventory will be used to determine what dragon is summoned
With the introduction of whistles you can now have more then one dragon that you are able to summon
The whistles functions similarly to modded ender chests and similar items, where crafting 2 of the same color of whistle will function the same, so losing a whistle doesnt lose the dragon.

Dragon armor has been made into its own item rather then using horse armor
The icon and armor textures are still a work in progress but the armor itself is functional
The armor can be found in some of the same locations as their horse counterparts

Change the player model to use the position of the "rider" bone when found, PR from NordAct