[Hat] broken link to hat-explore user manual

[Malcolm Wallace]

"herington, dean" <herington_dean at emc.com> writes:

> On page http://haskell.org/hat , the link to
> "hat_explore user manual"
>     http://haskell.org/hat/hatexploreuser.pdf
> is broken.

Thanks.  Now fixed.
Regards,
    Malcolm