Hellish Quart pre-alpha v. 2021.02.17.0

FIX:

- Isabella: changing stances when on the right side is now done with correct up/down diection instead of left/right in game logic
- Fixed bug when Jacek tried to enter ragdoll mode after decapitation
- Fixed bug where Isabella sometimes freezes when changing high and low guard stances

NEW:

- Barabasz: some new attack animations (beginnig to differentiate Barabasz from Jacek)
- Added new music track for Gallows arena