FUNCTION: LieTools/WeylWordAction
USAGE: WeylWordAction(ww,fwgt);
SYNOPSIS: WeylWordAction(ww,fwgt) yields the result of applying
  a Weyl group element (specified as sequence of simple
  Weyl reflections) on a fundamental weight fwgt.
CAVEATS: requires a previously initialized global Lie algebra environment.
  (See LieTools[gSetup].)
EXAMPLE: 

SEE ALSO: LieTools[WeylOrbit], LieTools[WeylReflect]
