Use 'set filetype=clojure' instead of 'setfiletype clojure'
Use 'set filetype=clojure' instead of 'setfiletype clojure'

Otherwise a file with a leading # is recognised as 'conf' filetype.
Since the conf filetype is already set, setfiletype won't override it
with clojure.

Fixes #15

clones/vimclojure,clones/vimclojure,clones/vimclojure