changed loadImage in Helper.cs to accept an optional rectangle and color for resizing.
players are now saved in the Level.cs
created 2 enumerations:
    MapType -> rawImage and customMap
    SpecialCollisionValue -> nothing(-1) and collision(-2)
implemented MapReader with load method for rawImages (simple(one color for collision))
make rotateVector in Helper.cs more efficient for the collision detection, by overloading the method by adding sin and cos as float values instead of the rotation in radiant itself
changed Constructor in Player.cs by exchanging the file path string for the texture, which is loaded and resized by Level.cs