ANNOUNCE - graphics package

[Vlad Dumitrescu]

From: "Bengt Kleberg" <Bengt.Kleberg@REDACTED>
> interestingly enough there is no sys->close() function for file handles 
> in inferno programming with limbo. the manual says ''There is no 
> explicit ``close'' routine: when the last reference to the file 
> descriptor is released, the system closes the associated file.''

Limbo uses reference counting, so this is feasible. 

/Vlad