Preliminary working version of TinyRenderer for standalone demos,

it works without OpenGL dependency now, so it runs in the cloud :-)
Add scaling support for TinyRenderer, remove some un-used normal mapping in TinyRenderer shader, expose light_dir_world,
remove accidental hard-coded path in tga write_tga_file,
Fix InverseDynamicsExampleCreateFunc, enum has to start at 0

examples/TinyRenderer/TinyRenderer.h

@@ -16,9 +16,8 @@ struct TinyRenderObjectData
     Matrix m_viewMatrix;
     Matrix m_projectionMatrix;
     Matrix m_viewportMatrix;
-
-	btVector3 m_eye;
-	btVector3 m_center;
+	btVector3 m_localScaling;
+	btVector3 m_lightDirWorld;
 	
     //Model (vertices, indices, textures, shader)
     Matrix m_modelMatrix;