NetMauMau V0.4

Just released NetMauMau V0.4
0.5 is the next release ;-)

At the time I made the pull request this file didn't existed. I didn't know that GitHub wants to get all future changes pulled.

I'm thankful for advices on this issue too, since I'm quite new too git as well. I personally prefer Subversion and are forced to use it git here :-/