add authorship in README.md

README.md

@@ -106,3 +106,18 @@ Max Körschen:
 - Building.cpp/hpp (interactions and logic)
 - level.cpp/hpp (eventhandling for units and buildings, movement, attack etc)
 - debugging in CombatEngine.cpp/hpp, Bullets.cpp/hpp
+
+David Maul:
+- Engine.cpp/hpp
+- Scene.hpp
+- Spritesheet.cpp/hpp
+- Tile.cpp/hpp
+- Window.cpp/hpp
+- Effect.cpp/hpp
+- Level.cpp/hpp
+- main.cpp
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+
+
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+