Fix the compile pass, still unresolved symbols.

code/HMP/HMPLoader.cpp

@@ -47,14 +47,16 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef ASSIMP_BUILD_NO_HMP_IMPORTER
 
 // internal headers
-#include "HMPLoader.h"
-#include "MD2FileData.h"
-#include <memory>
+#include "HMP/HMPLoader.h"
+#include "MD2/MD2FileData.h"
+
 #include <assimp/IOSystem.hpp>
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/scene.h>
 #include <assimp/importerdesc.h>
 
+#include <memory>
+
 using namespace Assimp;
 
 static const aiImporterDesc desc = {