Tutorial / Project Template Usability Improvements

[thobbs]

Notes from one user:

• The version of Clojure I have is different from the one referenced in the tutorial's project.clj file. I had to take care that the version I needed was referenced in the file.
• I didn't realize I had to name the lein project "sketch"
• I didn't realize I had to copy the sketch subdirectory into the clj subdirectory

Need to update files and instructions to improve these