Minor maintenance release.
- Added keyboard command for activating the "Calculate Credits" tool (default: Shift + C)
- (YR/Ares) Added support for directional alpha images (Credits: Starkku)
- "Smoothen Water" script now ignores water tiles that have rocks on them
- Fixed turret anim facing frame calculation to match the game (Credits: Starkku)
- Fixed voxel turrets not always getting rendered on top of voxel units