- Now has 4 sections.
- Made to support the new inventory design.
- Passive items now only affect player if added to specific sections.
- All sections have their full size, null indicates a slot is empty.
- Functionality to easily move items between sections.
- Much more convoluted back-end code.
- It just works now.

- Now can take CharacterStats.
- Creates a new AttackStat instead of modifying this one.
- Throws exception if ran on an already calculated AttackStat.

- Checks crit and damage variance.