Update rule in README:

Instead of opening an issue in Github and URL to the tool. We require now that the participants
send us an email containing all the information. This is to avoid copy-paste solutions and
solutions with only parameter changes only.

README.md

@@ -27,9 +27,7 @@ The competition is organized by KTH Royal Institute of Technology, Stockholm, Sw
 To be informed about news, intermediate rankings and final results, register to the CodRep mailing list:
 [[email protected]](mailto:[email protected])
 
-To tell the world that you want to win CodRep, open an issue on this repository.
-
-To officialy participate to the competition, update your issue so that it contains: 1) the team name for the leaderboard 2) a URL to the tool and 3) the claimed score on Dataset1 and Dataset2.
+To officially participate to the competition, send us an e-mail so that it contains: 1) the team name for the leaderboard 2) a copy of the tool (the tool and instruction on how we should run it) 3) the claimed score on Dataset1 and Dataset2.
 
 The deadline for participating is July 14th 2018, 11:59pm AoE.