Starting on redoing checkers code
Merge branch 'backend' of https://github.com/Philebrkr/game_contest_server_jterm into backend

Conflicts:
	exec_environment/match_runner.rb
More python checkers
checkers
Merge branch 'tournament_frontend' of https://github.com/Philebrkr/game_contest_server_jterm into backend

Conflicts:
	app/models/concerns/uploadable.rb
Added quiet flag to dos2unix when uploading files
Merge branch 'backend', remote-tracking branch 'origin' into dev

Conflicts:
	app/models/match.rb
	db/seeds.rb
	exec_environment/match_runner.rb
	spec/exec_environment/tournament_runner_spec.rb