Revisions for hordeweb/imp/index.php

Add link to IRC page.

Cleanup and 'modernize' imp entries.

Here's the new site.

Massive run over the web tree.
- discontinue use of constants for $toolbar_mode. no reason, and has
  potential to break mirrors
- get rid of $subsite variable, which was never used anywhere
- start of skeleton sites for gollem, nic, and mimp.
- other cleanups to files as I touched them

Updated for IMP 3.0, Horde 2.0, etc.

Most of this commit is making sure that include paths have './' prepended
to them if they refer to files in the same directory, so that things work if '.'
isn't in the include path.

Also, cleaned up some other style stuff like removing parens from around
include statements, spacing, etc.

Fixed a few links to point to /source, not /cvs.

Other random touchups to the site - removed some unused modules from
lists, revamped descriptions of others.

Okay, I've been promising this for a while; here it is. Much more
information on IMP, better organization, and a little bit of link fixing,
prettying, etc. becides.

Enjoy!

(If you want to update the news for IMP, each branch's news is stored in the
yearly files, and in the latest.html file - that's the file that gets
included on other pages, so make sure to update it).

Converting hordeweb from .php3 to .php.  I think I've gotten everything
here, but some .php3 references may have slipped through.

cjh: adding a /papers section, including the nercomp slides (moved them) and
the Scalable Webmail HOWTO.

zerodivide:

First pass at building a "subsite" for horde.org...