Prolog 4.1.49

Prolog can now import data in the new CoalLog standard.
You can now import coallog data - view or modify and if necessary create a new set of coallog data.

Prolog now contains a new help dialog on startup that allows you to specify whether you are creating a new prolog file, opening an existing prolog file, an old version3 prolog file or a coallog data file. Many clients found it confusing when trying to open old prolog data.