Implement terrain file reading to generate navmeshes in the future (#703)

* Implement terrain file reading to generate navmeshes in the future

* Make Emo's suggested changes.

dNavigation/dTerrain/RawFile.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+class RawChunk;
+struct RawMesh;
+
+class RawFile {
+public:
+	RawFile(std::string filePath);
+	~RawFile();
+
+private:
+
+	void GenerateFinalMeshFromChunks();
+	void WriteFinalMeshToOBJ(std::string path);
+
+	uint8_t m_Version;
+	uint16_t m_Padding;
+	uint32_t m_ChunkCount;
+	uint32_t m_Width;
+	uint32_t m_Height;
+
+	std::vector<RawChunk*> m_Chunks;
+	RawMesh* m_FinalMesh;
+};