Fixed the error in the hook used after a state change in a TODO in
org-checklist. Apparently this used an old convention where the new
state was in the 'state' variable while it is with recent orgmode
versions in the 'org-state' variable.

Removed a bunch of global bindings I actually never used from
org-mode.el in the snamellit folder.

Removed dependencies on 'cl' in the few locations this was used.