Version 0.5.0

• Fixed some README typos
• composer generate-interfaces now loads the api key from a .apikey file if the key isn't passed as command argument
• Updated interfaces
  • IDOTA2Match_570
    • Added GetTopWeekendTourneyGamesV1
  • IDOTA2Ticket_570
    • Added ClaimBadgeRewardV1
    • Added GetSteamIDForBadgeIDV1
  • IEconItems_570
    • Added GetEquippedPlayerItemsV1
  • IEconService
    • Added GetTradeHistoryV1
  • IPublishedFileService
    • Updated QueryFilesV1
  • ISteamCDN
    • Added SetPerformanceStatsV1