Add .txt to well-known file types

"Martin J. Dürst" <[email protected]> Wed, 02 Nov 2011 10:27:11 +0900

Newsgroups	gmane.comp.web.amaya.devel
Organization	Aoyama Gakuin University
Message-ID	<[email protected]>

When opening a file or adding a link and using the file browser, Amaya 
just shows files of "known type". Although Amaya knows about text files, 
these are strangely enough not among the known file types. Can you 
please add them?

Regards,   Martin.