Copyright for openoffice.org-en-au source package in Xenial

This is a dummy package to smooth renaming from
openoffice.org-thesaurus-en-au to mythes-en-au and can
safely be removed afterwards. I do not think this small
thing is even copyrightable, but in case is needed,

Copyright 2011 Agustin Martin 

and is placed in the Public Domain.