Show a random funny information message when turning the guns on or off

[ironcev]

This feature looked like a nice idea when I proposed it. It turned out it's not ;-) Rejected because of the following reasons:

• The information message becomes actually very annoying after some time. It has to be removed each time. No one will read it.
• It is anyway clear if the Guns are turned On or Off after the command is called.
• We will have a status bar indicator showing if the Guns are On or Off (#16).
• Last but not least, crafting good (and funny :-)) messages is not that easy as it sounds.