Add Windows support.

src/graphics/CMakeLists.txt

@@ -1,5 +1,8 @@
-list(APPEND graphics_LIB_INCLUDES OpenGlInterface)
+list(APPEND graphics_LIB_INCLUDES OpenGlInterface.cpp)
+list(APPEND graphics_HEADERS OpenGlInterface.h)
 
-add_library(graphics SHARED ${graphics_LIB_INCLUDES})
+add_library(graphics SHARED ${graphics_LIB_INCLUDES} ${graphics_HEADERS})
                           
-target_link_libraries(graphics PUBLIC GL)
+target_link_libraries(graphics PUBLIC GL)
+
+set_property(TARGET graphics PROPERTY FOLDER src)

src/graphics/OpenGlInterface.h

@@ -4,7 +4,7 @@ class OpenGlInterface
 {
 public:
 
-	static void draw();
+    static void draw();
 };