refactor and rename modeline functions
yasnippet: use dropdown menu, not x-menu
clojure-mode: remove some code from running

since I haven't used clojure-mode in a while I don't know what works and
what doesn't. I had some problems last time and I didn't have time to debug.
org-mode: no toc, no section numbers, no fold
org-babel: remove coderefs from executing code