Made project as described in quickstart.
(println "Hello world!")
;; no warning
(defn foo 
(println "o no"))
foo.cljs has a namespace name that is not consistent with the file structure.
1) a warning about
(:require (link: hello-world.foo)) not being able to find the namespace, and/or
2) a warning about
(hello-world.foo/foo) being a non-existent var.