added an UnequalFact to the Unity-Frontend

Assets/Resources/Prefabs/UI/Icons/ConeVolume_prefab.prefab

Assets/Resources/Prefabs/UI/Icons/CylinderVolume.prefab

Assets/Resources/Prefabs/UI/Icons/CylinderVolume.prefab.meta

Assets/Resources/Prefabs/UI/Icons/EqualCirclesPrefab.prefab

...Resources/Prefabs/UI/Icons/EqualCirclesPrefab.prefab.meta

Assets/Resources/Prefabs/UI/Icons/TestFactPrefab.prefab

Assets/Resources/Prefabs/UI/Icons/TestFactPrefab.prefab.meta

...sources/Prefabs/UI/Icons/TruncatedConeVolumePrefab.prefab

...ts/Resources/Prefabs/UI/Icons/UnequalCirclesPrefab.prefab

...sources/Prefabs/UI/Icons/UnequalCirclesPrefab.prefab.meta

Assets/Scenes/Worlds/RiverWorld.unity

Assets/Scripts/InteractionEngine/FactHandling/Fact.cs

Assets/Scripts/InteractionEngine/FactHandling/FactManager.cs

...ts/Scripts/InteractionEngine/Gadgets/EqualCircleGadget.cs

...ripts/InteractionEngine/Gadgets/EqualCircleGadget.cs.meta

Assets/Scripts/InventoryStuff/DisplayFacts.cs

...ts/Scripts/InventoryStuff/Items/images/CylinderVolume.png

...ripts/InventoryStuff/Items/images/CylinderVolume.png.meta

Assets/Scripts/InventoryStuff/Items/images/Equal circles.png

...cripts/InventoryStuff/Items/images/Equal circles.png.meta