Add missing require for cl-macs

It was definitely in use for cl-assert, cl-first, cl-case and a couple other
examples, so probably included by one of the many libraries referenced. However
this PR also added cl-loop and cl-destructuring-bind usage, so better to make it explicit.

clj-refactor.el

@@ -36,6 +36,7 @@
 (require 'yasnippet)
 (require 'paredit)
 (require 'multiple-cursors-core)
+(require 'cl-macs)
 (require 'clojure-mode)
 (require 'cider)
 (require 'parseedn)