Massive improvements to the /ts list command (grouping, count)
- Can now group the online clients / clients in the channel
  by their server group.
- Added a config setting to control this behaviour.
- Added a new variable to be replaced called "count".
  Just an indicator as to how many clients are online on the TS server.
- Changed default message to use the new count variable.
Also added count variable to the !list Teamspeak command.