bug fix

I've fixed a long time bug that has always bothered me.  I changed the
bhinclude/mantra-line.php file:

- print $mantra;
+ print stripslashes($mantra);

The problem is, wherever you have a subfolder of www/ you have to make a local
copy of bhinclude/.  So now the change needs to be applied in several places.

Rather than make the change, is there a way to make this work with one copy of
bhinclude/ from any folder?

Also, I fixed 404.html to use absolute paths so that the images can be found
when you get a 404 that is not in the root folder.  Eg.

   http://ballistichelmet.org/bunk/ass/link/

David