dot-emacs: Fix the eval-when-compile stanza.

Firstly, it just wasn't spelt correctly!  Secondly, it didn't include
the cl macros, which are useful.  (I henceforth permit the use of CL
macros, but not functions, in dot-emacs.el, on condition that the
expansions don't require CL functions.)

Thirdly, fix mdw-regexps to quote its expansion.