Changelog

Added new character shaders to the School Evil Erect stage.
- While base game doesn't have character shaders on this stage I think this helps it feel more in line with the normal School Erect stage. Also I think it looks cool.
Characters now properly flip left and right animations when necessary for all animation sets.
- This fixes an issue where Bloody Tankman didn't swap left and right poses in the latter half of Stress (Pico Mix).
Made a few improvements to the drop shadow shader.
- Added a pixel perfect mode so you can use non 90 degree angles on pixel stages and not look bad.
- Properly detects if an attached sprite has flipX set so you don't need to mirror the angle for certain sprites.
- Mask information can now be defined as in a character's extraData instead of being predefined in the stage script.
Fixed Week 6 Pico mixes being classified under the Week 7 category in the Freeplay Menu.
Added text that explains how to swap tabs in the Freeplay menu.
Adjusted the offset of Spirit's icon.

Modding API Version 1.3.1

Character extraData is now initialized as an empty map instead of null.
- This means you don't have to do a null check to be safe before accessing extraData anymore.