Add in the ReadMe information on how to activate D

Add in the readme information on how to activate DirectPlay.
This is the information that I found:

Re: Error starting module Win32DPNetgame
« Reply #4 on: October 15, 2017, 03:16:16 PM »

I had the same problem at first but found the solution: You need to enable DirectDraw. Go to control panel>programs>programs and features, under that is "turn windows features on or off. Look for section for legacy, expand it and check direct play. All will work fine then.