Refactor 2D map drawing.

2D level represntation now drawn as minimap in it's own texture.

level.h

@@ -3,8 +3,8 @@
 
 #include <SFML/Graphics.hpp>
 
-int level_init(sf::RenderWindow* renderWindow);
-int level_update();
+int level_init();
+void level_update(sf::RenderTarget* renderTarget, unsigned int drawSize);
 void level_end();
 float level_rayCastDistance(sf::Vector2f point, float direction);