implement cmdPrefixPrivate - fixes BigBrotherBot/big-brother-bot#49
Merge pull request #60 from ozon/imrpovements/player_matches

[ADMIN PLUGIN] better player listing for games where the player name is the same as the player cid
add tests for  command_prefix_private
add parameter filter_client_ids in getPlayerPings signature and update some parsers

BigBrotherBot/big-brother-bot#58
add filter_clients_id test for getPlayPings in bf3 parser
Merge pull request #61 from ozon/improvements/bf3_getPlayerPings

[CORE] add parameter filter_client_ids in getPlayerPings
Merge pull request #59 from ozon/features/cmdPrefixPrivate

[admin] implement cmdPrefixPrivate