Free Hero Mesh

  * Auto scroll option (using Player flag)
  * Configurable auto scroll option
  * Manual scroll option
* Bookmarks
* Message trace menu to enable/disable
* Bugs
  * Figure out why the $SeekerCloser class doesn't seem to work properly
  * Level 232 of SUPERHRO puzzle set (the Lava shouldn't expand? why?)
  * Animation stopping unexpectedly (until a key is pushed)
  * ObjLF.Volume+ObjRF.Volume+obj.Volume if ObjLF and/or ObjRF doesn't exist?
* Display solution comments/timestamp
* VCR mode
* Command-line switch for batch export levels
* SQL
  * Implement the GROUP column in the CLASSES table

* Moving objects is not allowed during LASTIMAGE processing.

* The way that the trigger phase works is different.

* In the ARRIVED and DEPARTED messages, Arg1 is always zero.

* Diagonal shoving is not possible.

* The JumpTo instruction has an additional effect that rarely matters,
having to do with the timing of ARRIVED, DEPARTED, and MOVED messages.


=== Level table definition ===

The following blocks are allowed in a level table definition:

(<label> <code...>)

static int jump_to(Uint32 from,Uint32 n,Uint32 x,Uint32 y) {
  int xx,yy;
  if(n==VOIDLINK) return 0;
  xx=objects[n]->x;
  yy=objects[n]->y;
  if(!move_to(from,n,x,y)) return 0;
  if(classes[objects[n]->class]->cflags&CF_COMPATIBLE) {
    objects[n]->arrived2=objects[n]->departed2=0;
    objects[n]->oflags&=~OF_MOVED2;
  }
  send_message(VOIDLINK,n,MSG_JUMPED,NVALUE(xx),NVALUE(yy),OVALUE(from));
  return 1;
}

static int defer_move(Uint32 obj,Uint32 dir,Uint8 plus) {
  Object*o;
  Object*q;