Std/Object Quick reference:
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o Making Containers:
    Just call in the object 'set_max_weight(int max)', where max is the 
maximum weight the object can hold. call 'set_can_open(1)' to make the
item open/closable.

o Making Lights:
    call:
       set_fuel(int x)    to set how much fuel the light has
       set_water(int w, string message) to set the light's waterproof 
                 behaviour (w = 0 is not waterproof). message is printed
                 when the object becomes wet.
       set_lit_desc(string m)  set the long description of the light when lit
       set_unlit_desc(string m) set the long description when unlit

o Preventing objects from saving:
    call:    add_property("NO_SAVE")

o Putting a message on the item to be read:
    call:    set_read("message")  or set_read() to clear

o Making Immovable objects: 
    call:    add_property("NO_GET")

o Making self destructing objects:
    call:    add_property("DECAY","decay message",<time>)
       where time is in real time seconds. 
    
o Changing an existing property:  
    use 'change_property' as 'add_property' will not add existing properties