- Random supersampling (prettier but quite slow)
- WIP: bette color gradient

- All the pixels are stored in an array, put in a surface then a texture
  so we don't draw each pixel one by one.
- The computation of this array is done in parallel (one thread by line)
- Use sscanf instead of atoi hack to parse options

Compute if a number is in Mandelbrot set.
Print it to the terminal.