release 0.98.1

[Peter S. <d98...@dt...>]

Changes:
 * STLport no longer needed for older gcc:s
 * A few new textures (menu-backgrounds, terrain)
 * Graphics and physics updates, mostly internal changes..
 * and some more..

And networking updates, but this is not enabled in this release since
I found a few evil bugs which will take a few days to sort out, I think.
I'll make a new release as soon as it works acceptlably.

I always forget what has changed, when you add something try to remember to
also drop a line in the ChangeLog file in the toplevel directory.
Even if it is almost trivial, better to log too much than too little..
I will also try to remember this ;)


And I started a 0.98.x numbering.. Didn't dare to make a 0.99 since that 
would imply that 1.0 is around the corner... ;)


/Peter