Treemap image of recent joyride file-system

[Gary C Martin]

Not sure if this is too much use for those actually hacking at the  
excess baggage in Joyride, but it's certainly quite pretty to look  
at :-) The wiki go/Filesystem was just a stub page:

	http://wiki.laptop.org/go/Filesystem

Please let me know if I've made any mistakes – think the 2nd diagram  
may be a nice introduction to how the file-system is being used for  
new dev folks.

I'm planning to do one more zoom in diagram on the running/active  
image area to actually label some of the larger blobs (wow the locale- 
archive is a monstrous 75.6Mb, ouch).

--Gary