Restructure and options

Changed over to the parent model structure for backpacks that use extra flare like the Warden and Ocelot to reduce file size. Also added two other pack options:

Tankless (Removes the tanks on the side of the backpack)
Bare (Removes the tanks and sleeping bag on the backpack)

To install download and drop resource pack of choice in your {ROOT}/configs/bluemap/packs/ server directory. Reload Bluemap, then wait for Bluemap to update naturally, use the /bluemap update command or force the whole world to update with /bluemap force-update