 - Prepare for modern opengl  - Use stbi_load_from_callbacks instead of stbi_load_from_file  - Compute and show loading progress based on file position
 - Prepare for modern opengl
 - Use stbi_load_from_callbacks instead of stbi_load_from_file
 - Compute and show loading progress based on file position

f1nalspace/final_game_tech,f1nalspace/final_game_tech,f1nalspace/final_game_tech