Fix the compile pass, still unresolved symbols.

code/MDL/MDLLoader.cpp

@@ -50,11 +50,12 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #ifndef ASSIMP_BUILD_NO_MDL_IMPORTER
 
-#include "MDLLoader.h"
+#include "MDL/MDLLoader.h"
+#include "MDL/MDLDefaultColorMap.h"
+#include "MD2/MD2FileData.h"
+
 #include <assimp/Macros.h>
 #include <assimp/qnan.h>
-#include "MDLDefaultColorMap.h"
-#include "MD2FileData.h"
 #include <assimp/StringUtils.h>
 #include <assimp/Importer.hpp>
 #include <assimp/IOSystem.hpp>