Tellico 1.3.3 does not store ISBN-13

[Todd A. Jacobs]

When looking up books with an ISBN-13 and then saving them to the
collection, I've found that this version of tellico is storing them as
ISBN-10 instead. Tellico should probably always use ISBN-13 over ISBN-10
when available, but should *definitely* use it when the full number is
given as part of the actual lookup.

-- 
"Oh, look: rocks!"
	-- Doctor Who, "Destiny of the Daleks"