Update TUTORIAL.md

http://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Clojure_Programming_Language_Logo_Icon_SVG.svg/200px-Clojure_Programming_Language_Logo_Icon_SVG.svg.png

Error generating thumbnail

The source file 'Clojure_Programming_Language_Logo_Icon_SVG.svg' does not exist.
Update TUTORIAL.md
Update TUTORIAL.md

Link Error: 
http://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Clojure_Programming_Language_Logo_Icon_SVG.svg/200px-Clojure_Programming_Language_Logo_Icon_SVG.svg.png

Error Message:
Error generating thumbnail

The source file 'Clojure_Programming_Language_Logo_Icon_SVG.svg' does not exist.
Merge pull request #2 from roberttomsons/master

Link Error: