ccc garch model

EV 9 ver 20150728 x86

another bug: p726, Chapter 1. Object Reference
General Options: b Use Berndt-Hall-Hall-Hausman (BHHH) as maximization algorithm. The default is Marquardt.
now the new options should be "optmethod=opg"

It seems that these is updated in equation object, but not in system object yet.

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