- 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.

- Right click to select a new center
- Mouse Wheel to zoom in and out.
- WIP: drag picture with left click

Replace int color with union to have the posibility to set them with
hexcode and retrive each color separatly as the member of a struct.

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.