cleaned up scripts to subfolders

Assets/Prefab/Tree.prefab

Assets/Scripts/EventSystem.meta

Assets/Scripts/EventSystem/EventSystem.cs

Assets/Scripts/EventSystem/EventSystem.cs.meta

Assets/Scripts/EventSystem/EventType.cs

Assets/Scripts/EventSystem/EventType.cs.meta

Assets/Scripts/EventSystem/IAction.cs

Assets/Scripts/EventSystem/IAction.cs.meta

Assets/Scripts/Resources.meta

Assets/Scripts/Resources/BerryBush.cs

Assets/Scripts/Resources/BerryBush.cs.meta

Assets/Scripts/Resources/Forest.cs

Assets/Scripts/Resources/Forest.cs.meta

Assets/Scripts/Resources/Outcrop.cs

Assets/Scripts/Resources/Outcrop.cs.meta

Assets/Scripts/Resources/Quarry.cs

Assets/Scripts/Resources/Quarry.cs.meta

Assets/Scripts/Resources/Resource.cs

Assets/Scripts/Resources/Resource.cs.meta

Assets/Scripts/Upgrades.meta