You can add leagues, big or small, to Sports Club Stats.
   It's free.
   It's easy.
   Just email import@sportsclubstats.com the:
      structure
      schedule
      and rules
   In a few minutes you'll get back a link to the league.
   Play around, have fun, you won't break anything.
   I look forward to seeing what you create.

Info about the various settings:
   https://docs.google.com/document/d/1-UneDNk6tkOrc_B-WBnGnc5KGiy2kttXC2fW8dR7QzM/edit?hl=en

For example, here is what created this league:

LeagueBegin
  League:     International Champions Cup (International C) (ID: 1a111) (Sort: League) (Playoffs: 1)
    Division: Group A                                       (ID: d133y) (Sort: Conf) (Playoffs: 1)
      Team:   América                                       (ID: t1h2s)
      Team:   Barcelona                                     (ID: t1h2t)
      Team:   Bayern München                                (ID: t1m9n)
      Team:   Celtic                                        (ID: t1m9p)
      Team:   Chelsea                                       (ID: t1h2v)
      Team:   Leicester City                                (ID: t1m9q)
      Team:   Liverpool                                     (ID: t1m9r)
      Team:   Milan                                         (ID: t1m9s)
      Team:   Paris Saint-Germain         (PSG)             (ID: t1h30)
      Team:   Real Madrid                                   (ID: t1m9t)
  Kind: pro
  Sport: soccer
  Gender: male
  Country: USA
  State: 
  Level: Z
  Season: 2016 (current: False)
  Author: Markus Paminger
  Note: 
  LotteryNote: 
LeagueEnd

SortBegin
Conf: Average Points, Average GoalsDelta, Average GoalsFor, Points
HeadToHead, DrawLots

League:least PositionInParent, Average Points, Average GoalsDelta, Average
GoalsFor, DrawLots
SortEnd

RulesBegin
  PointsForWinInRegulation:  3
  PointsForWinInOvertime:  3
  PointsForWinInShootout:  2
  PointsForLossInRegulation:  0
  PointsForLossInOvertime:  0
  PointsForLossInShootout:  1
  PointsForTie:  1
  PercentOfGamesThatEndInTie:  0.25
  PercentOfGamesThatEndInOvertimeWin:  0
  PercentOfGamesThatEndInShootoutWin:  0
  HomeFieldAdvantage:  0.5
  WeightType:  PythagenpatIgnoreShootOutWinningGoals
  WeightExponent:  1.4
  WhatDoYouCallATie:  draw
  WhatDoYouCallLottery:  lottery
  WhatDoYouCallPromoted:  promoted
  Promote:  1
  PromotePlus:  0
  PromotePlusPercent:  0.5
  WhatDoYouCallDemoted:  relegated
  Demote:  0
  DemotePlus:  0
  DemotePlusPercent:  0
RulesEnd

GamesBegin
TeamListedFirst: home
7/23/16   Celtic           1-2      Leicester City   (ID: g1qfax)
7/24/16   Milan            1-3      PSG              (ID: g1qfay)
7/26/16   Chelsea          1-0      Liverpool        (ID: g1qfaz)
7/27/16   Bayern München   3-3      Milan            (ID: g1qfb0)
7/27/16   Real Madrid      2016-1   PSG              (ID: g1u1gb)
7/29/16   Liverpool        2-0      Milan            (ID: g1qfb1)
7/30/16   Celtic           1-3      Barcelona        (ID: g1qfb2)
7/30/16   Milan            1-4      Bayern München   (ID: g1qfb3)
7/30/16   Real Madrid      3-2      Chelsea          (ID: g1qfb4)
7/31/16   PSG              4-0      Leicester City   (ID: g1qfb5)
8/3/16    Barcelona        4-2      Leicester City   (ID: g1qfb6)
8/3/16    Bayern München   0-1      Real Madrid      (ID: g1qfb7)
8/3/16    Milan            2-0      Celtic           (ID: g1qfb8)
8/6/16    Liverpool        4-0      Barcelona        (ID: g1qfb9)
GamesEnd