use @coltoa() for mark2grade (J) column
	publish markes.txt
	fix minor naming typo: markes.txt -> marks.txt
	use @coltoa() everywhere
	use @coltoa everywhere
	modified?   marks.txt
	add CreditSF (creadit so far) column
	publish marks.txt
	add reverse counters for accumulated marks and gpa
	publish  marks.txt
	fix pre-difined ranges
	put the counters (forward and backward) in the last columns
	this eliminates the need to define static ranges
	publish:   marks.txt
	get rid of predefined ranges
	publish:   marks.txt
	add includedfb columns
	publish:   marks.txt