add account for cscott and add to rhodium

RT #6655

user: cscott
labs user: cscott (existing, UID 2880)
real name: C. Scott Ananian
email: cananian@wm

access requested: rhodium (QA box for new PDF system)

reasoning: wrote the majority of the bundler and renderer
           for the new PDF system

approved by: Terry Chay

Change-Id: I59677e441f1f09c971d1bd6c6f924fe49b349653
key: https://office.wikimedia.org/w/index.php?title=User:CAnanian_%28WMF%29/ssh&oldid=105769