Added GRAPHVIZ to .gitignore
Added GRAPHVIZ to .gitignore

sylvanmist/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,sylvanmist/Web-Karma,sylvanmist/Web-Karma,sylvanmist/Web-Karma,rpiotti/Web-Karma,usc-isi-i2/Web-Karma,sylvanmist/Web-Karma,usc-isi-i2/Web-Karma,usc-isi-i2/Web-Karma,usc-isi-i2/Web-Karma,rpiotti/Web-Karma,rpiotti/Web-Karma,rpiotti/Web-Karma