Sophisticated Backpacks

Added battery upgrade
- similar to tank upgrade shows on the backpack model (including a bit that shows the charge)
- also takes over part of backpack's inventory and shows charge in there
- has two slots for charging / discharging the battery
- is compatible with mods that support FE both in item as well as in block form so you can charge the battery in world using pipes or as an item in blocks that support charging items
- Thanks Ridanisaurus yet again for awesome model and gui textures
Added advanced feeding upgrade - has options to select at what level of hunger to feed player as compared to how much hunger food restores. Also another option that allows to turn off feeding immediately when tiny bit hungry if they player is hurt as well
Added item fluid handler capability to tank upgrade so that this can be filled in its item form (like in a Mekanism tank)

Updated Chinese translation (Thanks PigeonNian)
Energy and fluid contents now show in inventory tooltip that shows when shift is pressed when over backpack

Fixed going backpack from subbackpack gui to the main backpack one in backpacks with inception upgrade - was broken with last release and incorrectly always shown gui of the first backpack found in player's inventory
Fixed bug that caused items other than upgrades to be deleted when they were clicked on upgrade items in backpack's upgrade slots
Fixed issue where upgrade items could be shift clicked from upgrade slots into open upgrade tab slots which in case of crafting upgrade meant the upgrade got deleted by being shift clicked into its own tab slots. Now will only try to shift click into backpack inventory and then player's inventory
Fixed performance issue with compacting upgrade when recipes exist that have expensive match logic. There's now cache so further compacting as well as just ignoring non compactable items just works with cache and doesn't need to evaluate recipes.