1) Type mvn clean install
2) Then type mvn clojure:repl to work at REPL 
3) To work in within emacs you first need this in your .emacs

(when
    (load
     (expand-file-name "~/.emacs.d/elpa/package.el"))
  (package-initialize))

 --- then install the swank packages ... type meta-x package-list-packages
you'll want clojure-mode, slime, slime-repl, swank-clojure
4) Then at a shell type mvn clojure:swank
 - then in emacs go meta-x slime-connect, hit return 3 times and you should be connected to the SWANK clojure you started above.