InstaREPL doesn't respect :refer-clojure :exclude libraries

[cakenggt]

The InstaREPL does not correctly exclude core libraries when they are excluded in the ns tag with :refer-clojure :exclude

Steps to reproduce:

1. Execute lien new app exclude-test
2. Go into src/exclude_test/core.clj and turn InstaREPL on
3. Change the contents of the file to the following

(ns exclude-test.core
  (:refer-clojure :exclude [println])
  (:gen-class))

println

(defn -main
  "I don't do a whole lot ... yet."
  [& args]
  (println "Hello, World!"))

4. See that the println line references clojure.core instead of nothing