Fixed SimpleTexturedDirectX11 sample.

- Removed OpenGL/Glut references in SimpleTexturedDirectX11 CMakeFile
- Moved UTFConverter from SimpleTexturedOpenGL to its own file to be able to reuse it.
- Added compile definition SHADER_PATH to allow to locate the shader files in CMakeFile
- Fixed compile warnings
- Made global pointers null to help prevent dangling references.
- Added missing members initialization in class constructors.
- Removed references to missing model "Models/mymodel.fbx"
- Fixed error when extracting model file directory
- Added missing device context assignment in ModelLoader Load method
- Fixed memory leak caused by variable 'ourModel' not deleted.
- Removed call to dev->Release() in ModelLoader.cpp
- Adjusted Release() calls in reverse order when cleaning up D3D
- Made Throwanerror implementation throw an error instead of displaying a message box
- Fixed leaking D3D resources
- Added a pointer to an ID3D11Debug to dump live objects.

samples/SimpleTexturedOpenGL/SimpleTexturedOpenGL/src/model_loading.cpp

@@ -21,8 +21,6 @@
 #define STB_IMAGE_IMPLEMENTATION
 #include "contrib/stb_image/stb_image.h"
 
-#include <locale>
-#include <codecvt>
 #include <fstream>
 
 //to map image filenames to textureIds
@@ -35,7 +33,7 @@
 #include <assimp/scene.h>
 #include <assimp/DefaultLogger.hpp>
 #include <assimp/LogStream.hpp>
-
+#include "UTFConverter.h"
 
 // The default hard-coded path. Can be overridden by supplying a path through the command line.
 static std::string modelpath = "../../test/models/OBJ/spider.obj";
@@ -77,35 +75,7 @@ GLuint*		textureIds;							// pointer to texture Array
 // Create an instance of the Importer class
 Assimp::Importer importer;
 
-// Used to convert between multibyte and unicode strings.
-class UTFConverter {
-	using UTFConverterImpl = std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>;
-public:
-	UTFConverter(const char* s) :
-		s_(s),
-		ws_(impl_.from_bytes(s)) {
-	}
-	UTFConverter(const std::string& s) :
-		s_(s),
-		ws_(impl_.from_bytes(s)) {
-	}
-	UTFConverter(const std::wstring& s) :
-		s_(impl_.to_bytes(s)),
-		ws_(s) {
-	}
-	inline const std::string& str() const {
-		return s_;
-	}
-	inline const wchar_t* c_wstr() const {
-		return ws_.c_str();
-	}
-private:
-	static UTFConverterImpl impl_;
-	std::string s_;
-	std::wstring ws_;
-};
-
-typename UTFConverter::UTFConverterImpl UTFConverter::impl_;
+using namespace AssimpSamples::SharedCode;
 
 void createAILogger()
 {