Admin can decide to play best of 3 or 5 at anytime

Game dialog always contains 5 fields and admin can enter
3 or 5 results. It depends only from admin's decision.
0.0.9-1: admin can select the round-robin stage breaking algorithm

There are three cases:
   - A-B, C-D
   - A-D, B-C
   - A-C, B-D

This permutation is applied only after finishing of round-robin stage.
This should work with bigger number of groups also ( 8 or 16 for example )