- 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

A Config struct and more getopt options for window size, real/imag
range, center position.

Stop using the complex standard lib, replaced it with a variables
for the real part and imaginary part of z.

Zooming and moving is proportionnal to the range we are viewing,
feels more natural than incrementing by a constant value.

Added color palette instead of brighness level to display the set
boundaries.
Vim-like shortcut to move around.

The test to check if something is in the set return -1 else returns the
number of steps, then map the step to a brightness of the pixel.

Loop throught each pixel and color it black if its in the set,
white otherwise.
This is eavily inspired by the coding train video on the subject.
(https://www.youtube.com/watch?v=6z7GQewK-Ks)