Fix errors with admin commands that use DAKGetLevelSufficient.

* Fixes invalid overload error from Server.GetClient.

* Fixes missing function error for calls to DAKGetSteamIDLevel.
Merge remote-tracking branch 'upstream/master'
Fix issue with 'stuck' being issued when user votes for 'random'
Fix issue with plugin_voterandom not loading if map changes or server is started while random teams are active.
Fix typo in MapVote.kPregameNotification default message.
Merge pull request #21 from browe/master

Fixes for 'random' vote plugin