Airfoil Rocket.allInfo() method

[Gui-FernandesBR]

Not so long ago, we had #140 solving bugs regarding airfoil implementation. It's true that now rocketpy is dealing very well with these non-flat fins, however I feel we could implement some plots in rocket.py file to show to the user.

Some of them could be:

• Simple plot of airfoil data the user inputed by addFins() method
• Derivative of Lift coefficient by angle of attack

But of course feel free to add any other information you consider important!