In its essence, the archive command does this :
archive /tmp/TEST.png
mv /tmp/2013-10-20--TEST.png
I follow here the principle from gmail that you should 98% of the time,
archiving is better of deleting.
XDG Base Directory Specification
http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
Please review this patch, I'm not a real bash programmer.