Added TeamTableStats model.
Team table stats finished.
Countries.
Flags.
Flag styling.
Flag styling.
Player model.
Player requests.
Players done.
Split seed file.
Player live search.
Player seeds.
Added full name to players.
Team nickname can be blank.
Helper methods for matches.
Summarizing of team table stats.
Fixed spec since nickname isn't required.
Seeds.
Changed match day name to a match_day_number integer.
Added whoscored_id to team.