Mexico League System

Included in this file:
- Mexican league system expanded to include Segunda and Tercera
- NEW LEAGUE SYSTEM:
- No more average points relegation
- No more Apertura and Clausura
- No more playoffs
- Direct promotion and relegation
- Liga MX transfers updated to 6/8/2017
- Promotions/Relegations updated for IRL Apertura 2017
- Removed Coras de Tepic and Jaguares de Chiapas
- Added Atlético San Luis
- Added kit colors and affiliates for some Segunda and Tercera Teams

Pending:
- Ascenso MX transfers
- Kit colors for teams still missing
- Stadiums for teams missing