wip tilemap town api

---- Utility stuff ----
contains(array, value)
Returns true if array has a given value in it.

index_of(array, value)
Index of value in array.

len(value)
Returns string length or array length.

---- Map manipulation / information ----
map_owner()
Returns name of map owner.

map_width()
map_height()
Returns dimensions of map.

density(type)
Returns the density (true/false) of a tile or obj.

tile_get(x,y)
tile_put(x,y,type)
Gets/sets the tile type at x,y.

obj_get(x,y)
obj_put(x,y,list)
Gets/sets the list of the obj types at x,y.

---- Player information ----
player_get(player, key)
player_set(player, key, value)
Get/store per-player saved information.
Saved between map visits.

player_displayname(player)
Returns display name of the player.

player_x(player)
player_y(player)
Position of player.

player_move(player, x, y)
Move player to a new position.

player_here(player)
Returns true if player is on the map.

player_who()
Returns a list of the currently present players.