setup-which-func-mode.el: Enable and Improve `which-func-mode`.
setup-python-lang.el: Update.
setup-lisp-lang.el: Update.
setup-ibuffer-mode.el: Bugs fix.
Remove a setup-etags/grep-select.
setup-cider.el: Update.
setup-clojure-lang.el: Update.
Add a `grep`.
setup-occur-mode.el: Clean up.