be case-sensitive for config file

include/Render.h

 
 #include <vector>
 
-#include "Config.h"
+#include "config.h"
 #include "math/Matrix.h"
 #include "ViewVolume.h"
 #include "World.h"

src/CMakeLists.txt

 
 # Configuration Header file
 configure_file (
-    "${PROJECT_SOURCE_DIR}/include/Config.h.in"
-    "${PROJECT_BINARY_DIR}/Config.h"
+    "${PROJECT_SOURCE_DIR}/include/config.h.in"
+    "${PROJECT_BINARY_DIR}/config.h"
 )
 
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