Enable electric-pair-mode.

Use 'electric-pair-mode' instead of 'autopair' if emacs >= 24.4. A
couple of initialization modules had been modified in order to
customize 'autopair' only if loaded.


git-svn-id: svn://localhost/emacslib/emacslib/trunk@561 a9598837-e506-0410-a967-fbf0066ee963
Fix annoyance with 'arv-py-electric-colon'.


git-svn-id: svn://localhost/emacslib/emacslib/trunk@562 a9598837-e506-0410-a967-fbf0066ee963
Solves issue with the `arv/generate-lab-faces' function.


git-svn-id: svn://localhost/emacslib/emacslib/trunk@563 a9598837-e506-0410-a967-fbf0066ee963