profileCI 1.1.1

Bug fixes and minor improvements

When the argument epsilon to profileCI() is negative, monotonic cubic spline interpolation is now used instead of quadratic interpolation. Quadratic interpolation could fail in some cases.
In the documentation of the argument object to profileCI() it is emphasized that the parameters in the fitted model object must have names.
Fixed bugs in profileCI-internal.R to avoid storing some slightly incorrect parameter values near the confidence limits in the attribute "for_plot" in the returned object.

An argument flat has been added to profileCI() to deal with cases where one or both of the limits is (minus or plus) infinity because the profile log-likelihood fails to drop below the level that defines the confidence interval.
Arguments lb and ub have been added to profileCI() to place respective lower and upper bounds on the interval over which profiling takes place.
A logLikFn method has been added for objects inheriting from class nls and an example added to the documentation of profileCI().

The argument optim_args actually works now! Thank you to Jakob Madsen (#1).
An explanation of the creation of coef and vcov methods has been added to the description of object in the profileCI() documentation.
Arguments to the user-supplied log-likelihood function are extracted explicitly to simplify the code and avoid potential argument matching issues.