WARNING!

This code should be considered proof-of-concept quality and as such
MUST NOT be run on open Internet-facing sites. At least run it over
https and put some authentication in. It should be ok to run it
behind NAT (i.e. at home) without authentication and for testing
purposes but it's really not a production-quality code.

YOU HAVE BEEN WARNED.

That said, patches welcome. Send them to grok@zyxxyz.eu (diff -u against
the latest published version). For new versions, check:

https://files.warwick.ac.uk/grok/browse#

Quickstart:

1) Edit config.php and configure paths and urls (leave other settings as 
   they are for now),
2) Make the image cache (default ./i) writeable by your www server
   (i.e. 'chown wwwrun ./i' -- provided wwwrun is the user that your
   webserver runs as,
3) make sure ImageMagick is installed and in the $PATH (check it by
   typing 'which convert')
4) ...
5) Profit!


