Revert "No longer require 'cl."
Revert "No longer require 'cl."

This reverts commit 139b566f4d573b76dce90441218086548cac395a.

gugek/emacs-color-theme-solarized,dgoel/emacs-color-theme-solarized,calve/emacs-color-theme-solarized,mattduck/emacs-color-theme-solarized,ramLlama/emacs-color-theme-solarized,junag/emacs-color-theme-solarized,bradwright/emacs-color-theme-solarized,dcherian/emacs-color-theme-solarized,lokiiart/emacs-color-theme-solarized,sellout/emacs-color-theme-solarized,bradleywright/emacs-color-theme-solarized