Added Stationary System to Wiki

[Seamus Byrne]

Hello,

I added a Stationary System for Fluid to the Wiki.

http://wiki.fluidproject.org/display/fluid/Identity+System

 From this page you can download a Fluid letterhead, an envelope and a 
business card template, all of which are easy-to-customize.

These assets can be used to promote and increase awareness of the Fluid 
project across non-digital touchpoints.

Kind Regards,
Seamus