v0.4

Some nice progress this week:
- Redid a bunch if the code related to missions with the goal of making the core gameplay stable before starting on expanding the mission gameplay.
- Added save management menus and replaced the old single save by an auto save before passing the day
- Split facility upgrades away from crafting tab to a dedicated tab
- Tried to improve UI for adventurer inspect screen in the hall
- Added entry for stat training when inspecting adventurers (displays even without the scan)
- Added more sprites and animations, goblins finally look like goblins
- Fixed a bunch of bugs with assignment loot, loot is now tied to the assignment and added to stores once the assignment team gets home