Add README file
Add Makefile and main.cc
Add Makefile in src directory and add Chip8 class
Add Rom class
Add .gitignore file
Implement loading rom function in Chip8 class
Add emulate function Chip8 and use constant (constexpr) instead multiple definition
Use std::vector instead array
Add built-in font in Chip8 memory when init is called
Add sound and delay timer and implement playing bell function
Implement video output with glfw
Remove README and replace by README.md
Add Keyboard class
Set glfwSetKeyCallback to Keyboard::key_callback