[SG2] Fire teams mod

Brendan suggested that my proposed mod of last night was equal to the existing
RAW detachment rules...but that's not quite correct. My concept is that the SL
is has two actions and the team he's colo'd with has two actions but they're
not necessarily the same. For instance, you could have
the first action be team+SL : move, then team+SL: fire; or the second
action might be team:fire + SL:transfer action; or team:fire + SL:call
for arty.

In addition, the other fireteam can act on its own -- it doesn't have to
have the SL transfer an action.

The point of this is simply to keep the SL in contact with the squad.