Update readme.md

Author: Brutus5000

readme.md

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 This is the official FAForever API. Amongst others, the API offers the following functionality:
-- OAuth 2.0 compliant authentication server
 - User management (registration, password reset, etc.)
 - JSON-API compliant REST API for lots of community data (i.e. map, mod & replay vault, game statistics, etc.)
 - Leaderboards