Clarify submission file

[Adman]

I'm creating this issue so we don't forget about this.

My idea is that teams can submit whole "rcj_soccer_team_blue" controller (with included team_name.txt, logo, etc.), so we don't have to bother them with renaming it to robot.py.

@mrshu @dbscoach @aquahika What do you think?

[mrshu]

@Adman I strongly support this.

The question that comes to my mind is whether we should perhaps use some other name. Otherwise, why choose blue rather than yellow? :slightly_smiling_face:

[Adman]

Submission file changed a while ago to rcj_soccer_team_blue.