This is preliminary (and fairly low quality) support for the
Portal of Praevus Mission Pack.  The textures need to be subsorted
into wall, ceiling, button, etc., and the entities need a lot of
work: the new entities with their spawnflags are included, but
new specifics and spawnflags for old ones are not (but they
can be supplied to entities manually, using the information on
the Eye of Horus (http://www.hexenworld.com/h2entities).

It is possible that there might be a problem with the textures,
in that to get this to work on my system I had to specify Praevus'
directory as `PORTALS', but I thought it was originally `Portals'.
So if there is a problem with the add-on working, try using a text-editor
to replace all instances of PORTALS with Portals.

Unfortunately I'll be away and unable to support this properly until
mid-July, but Armin might be able to fix up any straightforward
technical errors I may have made.

  tiglari@hexenworld.com
