Added new parameters

nonparametric, syngrad, agq, focehess added to estimation
nosort added as a prefix to the value of data

Added more logic in Estimation properties so that it never enters into
an inconsistent state.
* to set focehess, method needs to be one of three values and stderr to
be one of two
* to set agq, method needs to be lagl
* to set nonparametric, method needs to be one of four values
* if method of stderr is change such that a parameter's conditions cease
to be met, that parameter is reset to its default value (e.g.
nonparametric = 0)