NJOY2016.51
Changes were made to ACER to increase the number of ZA values that go into the ACE file for a thermal scattering file from 3 to 16 values. This was an issue when one tried to specify the ZA values for a thermal scattering file such as ZrH or SiO2 (the additional ZA values were added by hand as required).
This pull request addresses issue #126