[Design] [Cosmo] Central location for managing Cosmo UI art

[Mimi Yin]

I've created a page on the wiki for all art produced for the Cosmo  
UI. I will endeavor to keep this up to date and send updates to the  
list when I make significant changes that need to be checked in.

http://chandlerproject.org/Journal/CosmoImages

I have also added this page to the Specs and Proposal section of the  
0.7 Cosmo Planning Page: http://chandlerproject.org/Projects/ 
CosmoZeroDotSeven#Specs%20and%20Proposals

Mimi