v0.1.3

• Add graphics and data saving : Program can now save results after simulations and show user status of each turn and saves them in a file.
• Add saves menu : Added saves menu to show user visual, graphics and previous saves data on different tabulations.
  Program will take a screenshot of the whole screen every second during simulation and make a GIF at the end to show the evolution.
  Program will collect data during simulation to create different graphics about the entities or their attributes (speed, range and size).
  The information displayed on the graphics is customizable by clicking on the colored squares at the right of each graphics.
  Program will show you the previous simulations save, their name, number of turns and date of save.
  You can delete each one separately by clicking on the red button at their right or directly delete all saves by clicking on the 'Delete all saves' button.
• Add auto_save parameter : Will automatically save last simulation data when going back to menu.