debug: Examine the classpath in the REPL

A very simplistic way of looking at the class path from the REPL, useful for debugging class path issues.

```clojure
(some #{"src" "resources"}
  (clojure.string/split  
  (System/getProperty "java.class.path") 
  (re-pattern (System/getProperty "path.separator"))))
```

This should not be fully relied upon, only used as a quick look at what is probably the class path being used
