YAMB - Yet another Minecraft Backpack

Just made it because i didn't find an working downloadlink for an backpack mod for Beta 1.8.1

Backpacks:
- Backpack (27 Inventory Slots)
- Ender Backpack (27 Inventory Slots) It shares the same inventory as all Ender Backpacks
- Big Backpack (54 Inventory Slots)
- Jetpack (5000 KJ Fueltank) Adds the possibility to fly without creative mode. Needs Fuel

Fuel Items:
- Coal (Vanilla) Delivers 1000 KJ
- Biomass Ball Delivers 500 KJ

Other Items:
- Polished Leather (Crafting Item) Used in the craftingreceipe of the Big Backpack
- Flesh Chunk (Furnace Item) Put it in the furnace to get leather
- Fuel Tank (Crafting Item) Used in the craftingreceipe of the Jetpack
- Coal Dust (Crafting Item) Gets produced while fueling the Jetpack and Coal delivers more KJ than is needed in the tank
- Solar Helmet(Armor Item) Delivers 20KJ per Second to Jetpack on Day

Keybinds:
- Press B to open the backpack if equipped (changeable)
- Press F to use the jetpack if equiped (changeable)
- Press Shift+F to add Fuel(Coal) to your Jetpack while equiped
- Press Shift+Right Click to quick equip the selected backpack

Changelog:

Version 1.5.3:
- added Solar Helmet
- buffed Coal to 1000 KJ
- buffed Biomass Ball to 500 KJ

Version 1.5.2:
- fixed the issue of disapearing jetpacks after they went out of fuel
- fixed the buggy coal dust if only 1 dust gets generated

Version 1.5.1:
- fixed the stacking of fall damage while using the jetpack
- fixed the consumption of hunger while using the jetpack
- added Biomass Ball (New Fuel for Jetpack | 100 KJ)

Version 1.5:
- added Jetpack
- added Coal Dust
- added Fuel Tank
- added the possibility to equip an backpack with an rightclick while holding shift

Version 1.3:
- made Big Backpack functional
- minor bug fixes

Version 1.2:
- added an armor to display the backpack on the back of the player if equipped.
- added the possibility to open the equipped backpack with B(changeable).
- minor bug fixes

Version 1.1:
- added Ender Backpack
- made backpacks suitable in the chestplate armorslot

Version 1.0:
- added Backpack
- added Big Backpack
- added Flesh Chunk
- added Polished Leather