Replace tabs with spaces.  Set indent-tabs-mode to `nil' locally.  Fix indentation.

* clojure-mode.el (clojure-font-lock-keywords)
(clojure-display-inferior-lisp-buffer, define-clojure-indent)
(clojure-char-at-point, clojure-fill-docstring): Fix indentation.
Set `indent-tabs-mode' to `nil' locally in clojure-mode.el.
Add a FIXME: a reference to Slime is outdated.
Merge branch 'master' of github.com:bzg/clojure-mode