Update README.md
Update README.md
Update README.md
Update README.md
Minor cleanup of Clojure example.

Cleaned up some formatting and spacing. Used future-cancel. Future
subscriptions were not being returned properly. Replaced use of #_ with
comment form. Fixed rest args usage for hello example.
Merge pull request #121 from daveray/clj-cleanup

Minor cleanup of Clojure example.