Added Upgrades skill and changed the order of some other skills
Add Resting Skill
Added Upgradable, AutoCollector and AutoMiner both derive from Upgradable now
Added Damage Upgrades, Range Upgrades, Speed Upgrades, and Durability Upgrades for autonomous machines.
Added UpgradablePanel, displaying which upgrades a machine has
Autonomous machines do not drop their item when destroyed, but will drop all added upgrades
Added Beds, can be used to sleep through the night and heal a few HP