Creating structure to hold RCVSweb in SVN.

First stage of configuring CVSWeb for the ROOL site. No changes to
look and feel beyond using shared images for file icons.

Added various shared images. Though these are in the Rails shared
tree, they're actually presently shared between Collaboa and the
Perl-based CVSWeb.

A few include paths in the syntax library were still wrong, at least for
the installation on Alpha. Some spurious white space changes to files in
the 'app' tree. Fixes bug described by Ticket #37.

RForum attachments should now be displayed inline for any MIME types
known to the mime-types gem. Requires installation of said gem, so it
introduces a new external dependency. MIME type is based upon the
filename extension on the original uploaded file. Not submitted as an
RForum patch because it's a rather specific feature and the need for
the mime-types gem makes it less attractive to a more general user.

Removing SimpleTicket from SVN - I'm sold on Collaboa for now, even if
it is only ever used for the Web site SVN repository.

Missing attachments produced an application error rather than being
handled gracefully, before this change. Now, an alert is given to
warn the user that the attachment cannot be served. The browser is
redirected back to the referer URL if present, else the forum topic
list.

Use of PATH_PREFIX to make the configuration more easy to relocate.
Prompted by Ticket #33, where Radiant URLs were being served relative
to the document root; this is fixed in app/models/behavior.rb though
it is not a very clean solution.

Deleted local copy of RedCloth in vendor - 3.0.4 is installed
centrally anyway. Updated config/environment.rb so that it
includes the right file for the central RedCloth installation.

Removed junk files from a MacOS-based archive used as the Radiant source
along with an editor swap file or two hidden around the tree.

Swapped order of 'Part' and 'Release' selectors, which were backwards
- it makes sense for 'Part' to come before 'Release', so that 'Release'
is followed by 'Milestone'.

Initial import of CVSWeb 3.0.6 from http://people.freebsd.org/~scop/cvsweb/
into SVN. CVSWeb will be used as a Web interface onto the main repository,
since that is too large and too complex to convert from its current SVN
form into SVN.

Creating directory structure ready to import CVSWeb.

Completed the ERB behavior code. Extended the system to allow
filters access to instance variables too, thus providing better
ERB filter behavior. ERB filter renamed to reflect the new
requirement for Radiant changes - the old one can be used side
by side if need be, though the older one is deleted here since
the Web site doesn't need it. Added "execute command on change"
for filters and added a command to clear caches and restart the
ROOL site server.

Updated shared components exported from Radiant CMS.