add statistic calculating
fixed test
make create_pregame handler return version
fixed rating recalc
Merge remote-tracking branch 'origin/master'

Conflicts:
	log_n_res_handlers_test.py
	objects/game_results_log.py
fixed rating recalc
now default queue will not retry tasks after 5 fails
Merge remote-tracking branch 'origin/master'

Conflicts:
	queue.yaml