Show available external Tank CDs and their remaining cooldown.
Makes use LibGroupInSpecT functions to scan group member's specs and talents.

{{http://q-nerd.de/src/q1423243948625lk.tankCDs.jpg|screenshot}}

"/tankcds" to show command options (e.g. "/tankcds move" to move around).

Upon joining a group it may take a while for all CDs to show up.