New class: Cursed (thanks to Benli)

game/modules/tome/class/Actor.lua

game/modules/tome/class/Player.lua

game/modules/tome/class/PlayerDisplay.lua

game/modules/tome/class/interface/Combat.lua

game/modules/tome/data/birth/classes/afflicted.lua

game/modules/tome/data/birth/descriptors.lua

game/modules/tome/data/birth/worlds.lua

game/modules/tome/data/damage_types.lua

game/modules/tome/data/gfx/particles/dominated.lua

game/modules/tome/data/gfx/particles/gloom.lua

game/modules/tome/data/gfx/particles/gloom_confused.lua

game/modules/tome/data/gfx/particles/gloom_slow.lua

game/modules/tome/data/gfx/particles/gloom_stunned.lua

game/modules/tome/data/gfx/particles/gloom_weakness.lua

game/modules/tome/data/gfx/particles/stalked.lua

game/modules/tome/data/talents.lua

game/modules/tome/data/talents/cursed/cursed-form.lua

game/modules/tome/data/talents/cursed/cursed.lua

game/modules/tome/data/talents/cursed/endless-hunt.lua

game/modules/tome/data/talents/cursed/gloom.lua