- 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.

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

init, quit and run functions.
Error handling.

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