[Koha-translate] some images with text checked into CVS

Hi, [sorry if you've read this before; I sent it from the wrong account, and I don't think this went through.] I've put some xcf files in the Chinese (zh-TW) directories in CVS. If you are translating and are putting off translating the images, at least you don't need to erase the English words yourself :-) For these xcf files, I've kept the original English images for reference (regarding wording & font size) as the bottommost layer (or for a couple of them the 2nd-bottommost layer). (I have only done some of the images, mostly those on the two front pages.) Best regards, -- Ambrose LI Cheuk-Wing <a.c.li@ieee.org>