[BioPython] Updates to the Biopython website

[Brad Chapman]

Hello all;
I had time this weekend to work on the Biopython website and I've
implemented a number of the things I talked about doing a couple of
weeks ago, including suggestions we've gotten since then. The major
changes are:

-> ScriptCentral is back! By popular request, the list of pointers
to python code for the life sciences was readded to the website. It
is now editable on-line like the Participants page, so hopefully it
will easier to keep up-to-date and current. Please visit the page
and make sure I didn't make any errors getting the data there. Edit
errors or make additions as you see fit. As before, the username is
'biopython' and the password is 'user'.

-> More security for on-line pages. With on-line editable pages and
a well-known password come potential security concerns related to
annoying people with too much time on their hands. We now keep
backups of both the Participants and ScriptCentral page so we should
be able to fix any problems if people cause them.

-> Directory browsing for files and docs directories. No more
"directory listing not allowed" errors.

-> General code cleanup related to the ScriptCentral addition.

Please check it out and let me know about any errors or problems (or
things that you like!). As before, I'd like to encourage people who
haven't done so to add themselves to the Participants page.

I think this takes care of most of the comments people had about the
website (except for the logo, but we're working on that!). Hope it
looks good for everyone!

Brad