project.module: change html-entities to chars before mailing

[this will look stupid on the mailing list - look at it at drupal.org (see link below - in the mail!)]

e.g.
& to &
&lt; to <
&gt; to >
&quot; to "
&#039; to '
&nbsp; to [haha]
etc.

because
  &nbsp;&nbsp;&lt;span style="color: red;"&gt;*&lt;/span&gt;
(from a previous post) just isn't really accessible ;)

see also http://www.php.net/manual/en/function.htmlentities.php (incl. sample implementation)