2005/08/22	maintenence scripts 'recalc' and 'clean' added; some Bohemian graptolite zones added; Australian Silurian conodont zones added; table and proto of 'ref' added.
2005/08/18	errors in boundary names corrected; scripts 'info', 'gen' added; correct unt.g generated
2005/08/17	Dalejan and Zlichovian added; field 'bnd.type' added; proto unt edited accordingly; E.Dev. tentaculite and spore zones added; all scripts edited, simplified;
2005/08/17	aka table added;
2005/08/16	some scripts added, others edited;
2005/08/15	script to generate absolute dates from proportions, unt.g generated;