cleaning up structure

1. moved .assets/.sorttable.js into .assets/js/ and corrected the link
in .index.php
2. moved .assets/.style.css into ,assets/css/ and corrected link in
.index.php
3. removed .assets/.index.php it was an old copy of the index file
mistakenly left there
4. added a file for my notes of things to edit or consider
5. added an .mp3 without apostrophe in name for use in debugging share
and delete functionality which doesn't like apostrophe  in filename.