This is a simple little hack which modifies the grenade and rocket explosions to look a little
more like grenade and rocket explosions and a little less like wads of flash paper going *poof*.

A modified sound is included which actually sounds about right, although it is not nearly loud enough.

No substantive changes have been made.  Damage, etc., are as originally programmed.

Because the new routines take place on the wrong side of the server-client connection, this patch will
probably be useless in multiplayer.  This can't be helped, unless id releases more of the source. :(
Nevertheless, the number of entities being spawned has been kept to a reasonable level.

Just for kicks, the new explosions will also move items around a bit.  Nothing fancy.

This is a first attempt and some things are probably screwed up.  Sorry 'bout that.

The entirety of this code should probably be assumed to be copyrighted by id software.