Procedures:
D.15.9.1 afaces Returns a list of intvecs that correspond to all a-faces D.15.9.2 gitCone Returns the GIT-cone around the given weight vector w D.15.9.3 gitFan Returns the GIT-fan of the H-action defined by Q on V(a) D.15.9.4 gkzFan Returns the GKZ-fan of the matrix Q D.15.9.5 isAface Checks whether intvec corresponds to an ideal-face D.15.9.6 orbitCones Returns the list of all projected a-faces