cRankManager: Added GetAllPlayers() and GetPlayerName()
Updated api documentation.
cRankManager: Added ClearPlayerRanks()
Fixed SetDefaultRank() return value.
Merge branch 'master' into Ranks
Renamed GetAllPlayers() to GetAllPlayerUUIDs()
Fixed a typo in the description.
Merge pull request #1472 from mc-server/Ranks

Added more cRankManager functions