New generator class created for HighZ nuclear targets. Currently only difference is how the asymmetry is computed. So far I have implemented the isoscalar result for the asymmetry from the reference, I.C. Cloet, PRL 109, 182301 (2012). Eventually, full results with nuclear medium corrections will be implemented.

To invoke high Z generator, call highzdis in the macro files. Other parameters are identical to DIS generations.