FUNCTION: LieTools/WeylOrbit
USAGE: WeylOrbit(fwgt,Gt), WeylOrbit(fwgt), WeylOrbit(fwgt,Gtype,rnk);
SYNOPSIS: WeylOrbit(fwgt,Gt) yields the orbit of a weight vector fwgt
  (expressed in terms of a basis of fundamental weights) under the action
  of the Weyl group of Gt. When called with one argument fwgt, it is necessary
  to first initialize a global Lie algebra environment (see LieTools[gSetup]).
EXAMPLE: 
WeylOrbit([1,-2],A2);
        [[1, 1], [-1, 2], [2, -1], [1, -2], [-2, 1], [-1, -1]]

SEE ALSO: 
