Show upcoming matches

[timonla]

Show upcoming matches on team page.

Interesting fields:

• Against which team
• Average elo of other team (use lineup when available and fallback to entire team or last match?)
• Match room link
• Time left until the match
• Twitch links from the comments
• Game mode (Bo1, Bo2, Bo3, ...)

It's difficult to test right now, since I don't know how the match pages and the ajax response looks for matches that did not take place yet.