Allows date based archives to be listed by category.
The PHP commands for theme developers to use are pretty straight forward.
cba_get_category_id() returns the current category ID of the archive.
cba_the_year() returns the current year of the date based archive.
cba_the_month() returns the current month of the date based archive.
cba_auto_thedate() gets the string representation of the date.
cba_get_year_link($year) returns the permalink for the year archive based on the current category.