Convergence and Warning messages

[trubador]

It would be nice to be able to extract the info regarding convergence and warning messages from an estimation. I guess, it would require two additional data members (strings) for each estimation object (i.e. equation, logl, sspace, switchreg, etc.). Freezing output does not always come handy as the location of such info can change from one estimation to other.

[maxchen]

yeah, please do it. When we automate the process of thousands of estimations.