General format:
	@id:textual_name
	@map
			EITHER
		map definition 
			OR
		random(minw,minh)
	@end
	@legend
	k:mon:kobold
	s:ob:50:short sword
	#:cell:stone wall
	#:cell:EMPTY
	#:cell:SOLID
	@end
	@flags
	...
	@end

Legend is:
	c:type:what[:pct][:alttype:altwhat]
		OR
	c:exit (denotes an exit, for use by linkexits)

		if pct chance fails, use alttype & altwhat to determine 
		what to place.

	c = any letter
	type = ob, mon or cell
	pct = optional pct chance of appearing
	what = text of what this letter represents
	alttype = optional ob/mon/cell if pct chance fails
	altwhat = optional text of what it represents if pct chance fails

Flags can be:
	at(x,y) type:what[:pct]			// put what at position x,y
		'type' can be:  ob, mon, cell
		coords can be negative ("count back from right/bottom")

	atoneof(x,y)(x,y)...(x,y) type:what[:pct]
		// place 'what' at one of the given positions (picked randomly)

	exitat(x,y)		// vault exit is at position x,y

	box(x,y,x2,y2) type:what[:pct]		// outline box with what
	fill(x,y,x2,y2) type:what[:pct]		// filled box with what
		coords can be negative ("count back from right/bottom")

	cellempty:xxx // set empty cell type. eg. "dirt"
	cellsolid:xxx // set solid cell type. eg. "brick wall"

	scatter(x,y,x2,y2) type:what:howmany[:pct] // scatter what within region
		howmany can be:
			- a number (x)
			- a range (x-y)
			- a pct of the total region cells (x%)
		coords can be negative ("count back from right/bottom")
		pct is optional (chance of this happening)

	autodoors:pct	// automatically add at least one door to the edges of
			// this room.
			// pct is chance of the exit being a door as opposed
			// to jsut an opening.

	autopop		// automatically add obs/mons/pillars to this vault as
			// if it were a normal room.  

	dlevmin:xxx	// can only randomly appear at or below dungeon
			// level xxx (or map difficulty xxx for world map)
	dlevmax:xxx	// can only randomly appear at or before dungeon
			// levle xxx

	entertext:xxx 	// show xxx when a non-blind player enters

	goesin:xxx	// can only randomly appear in habitat xxx
			// (can appear multiple times)

	usehabitat:xxx // cells in this vault have habitat=xxx

	margin:x,y	// must be x/y away from edges of map

	//      MAY ONLY USE ONE OF THE FOLLOWING
	mayrotate	// vault can be rotated randomly
	mayflipx	// vault can be flipped horz
	mayflipy	// vault can be flipper vert

	nolink		// don't try to link this vault up to the rest of
			// the map

	rarity:xxx	// how common this vault is.
			// xxx can be: 
			//    common (default)
			//    uncommon
			//    rare
			//    vrare / veryrare
			//    never


	norandom	// this vault doesn't appear randomly. it will only
			// appear when specifically requested via a region's
			// outline.

	tag:xxxx	// add tag "xxx" to vault(for use with rndvaultwithtag)

NOTES:
	when adding lfs/objects, "random" creates a random one.