Dear Users:
1. It has been very confusing that LINE["GAMMA"] and Twiss["GAMMA"] return
gamma*beta, not gamma. Now It is corrected as
LINE["GAMMA"] and Twiss["GAMMA"] return gamma,
LINE["GAMMABETA"] and Twiss["GAMMABETA"] return gamma*beta = Sqrt[gamma^2 - 1].
The description on the web page was also corrected.