Fixed MANY bugs. Immortal Hearts will now properly shift left/right when you pick up or lose max HP. Immortal Hearts now work properly when you also have bone hearts.

Added a small API for other mod makers, that allows you to do things like fetch the pickup variant, spawn an immortal heart, and enable/disable immortal hearts automatically turning into flies.

0.5: Worked around an issue where other mods' "on damage" effects did not trigger, due to a bug in the official mod API.

0.4: Fixed immortal heart damage not applying on-damage effects. Fixed some more black screen conflicts with other mods' shaders. Fixed immortal hearts automatically being refilled to full when picked up, you now have to clear a room to refill it when at half a heart.

0.2: Fixed shader conflicts with other mods such as Job, resulting in black screens.

0.1: Initial Release