Add the capture image of "HomingBeaconEffect" at Example in README

[RyoYokoyama]

I couldn`t understand the function of "HomingBeaconEffect" when I read description of "Use Homing Beacon Effect On Jumps" in README.
So, I expect you to add the capture image of "HomingBeaconEffect" at Example to understand clearly.

[DavidLGoldberg]

Sorry it took so long to get back to you. This is a good idea yes. I'll leave it on the list and try to get around to it!